Janet Damita Jo Jackson is an American recording artist and actress. Born in Gary, Indiana, and raised in Encino, Los Angeles, she is the youngest child of the Jackson family of musicians. She first performed on stage with her family at the age of seven, and started her career as an actress with the variety television series The Jacksons in 1976. She went on to appear in other television shows throughout the 1970s and early 1980s, including Good Times and Fame.

At age sixteen in 1982, she signed a recording contract with A&M and released her self-titled debut. She faced criticism for her limited vocal range, and for being yet another member of the Jackson family to become a recording artist. Beginning with her third studio album Control (1986), she began a long-term collaboration with record producers Jimmy Jam and Terry Lewis. Her music with Jam and Lewis incorporated elements of rhythm and blues, disco, funk and rap with sample loop, triplet swing and industrial beats, which led to crossover appeal in popular music. In addition to receiving recognition for the innovation in her albums, choreography, music videos, and prominence on MTV, Jackson was acknowledged as a role model for her socially conscious lyrics.

In 1991, she signed the first of two record-breaking, multi-million dollar contracts with Virgin Records, establishing her as one of the highest paid artists in the industry. Her debut album under the Virgin label, Janet (1993), saw Jackson develop a public image as a sex symbol as she began to explore sexuality in her work. That same year, she appeared in her first starring film role in Poetic Justice. By the end of the 1990s, she was named the second most successful recording artist of the decade. All for You (2001), became her fifth consecutive studio album to hit number one on the Billboard 200 album charts. In 2007, she changed labels, signing with Island Records and released her tenth studio album Discipline the following year. Why Did I Get Married (2007) marked a concentrated effort for her to return to acting, followed by its sequel and For Colored Girls in 2010.

Janet Jackson was born in Gary, Indiana, the youngest of ten children, to Katherine Esther (née Scruse) and Joseph Walter Jackson. The Jacksons were lower-middle class and devout Jehovah's Witnesses; Jackson stated that although she was raised as a Jehovah's Witness, she eventually stopped practicing organized religion and views her relationship with God as "one-on-one". By the time Jackson was a toddler, her older brothers—Jackie, Tito, Jermaine, Marlon and Michael—were performing music at nightclubs and theaters as The Jackson 5. In March 1969, the group signed a record deal with Motown, and by the end of the year they had recorded the first of four consecutive number one singles. The Jackson 5's success allowed the family to move to the Encino neighborhood of Los Angeles in 1971, where they settled in a gated mansion called Hayvenhurst. Although born into a family of professional musicians, Jackson, whose love of horses resulted in a desire to become a race-horse jockey, had no aspiration to become an entertainer. Despite this, her father planned for her to pursue a career in entertainment. She once commented, "No one ever asked me if I wanted to go into show business ... it was expected."

In 1973, at the age of seven, Jackson appeared on stage in Las Vegas Strip with her siblings in a routine show at the MGM Casino. Jane Cornwell documented in her biography of the singer, Janet Jackson (2002), that at age eight, her father Joseph told her not to call him "Dad" anymore since he was her manager; he told her she would henceforth address him as "Joseph". She began her career as an actress with the debut of the CBS variety show The Jacksons (1976), in which she appeared with her siblings Tito, Rebbie, Randy, Michael, Marlon, La Toya and Jackie. In 1977, she was selected by producer Norman Lear to play a recurring role as Penny Gordon Woods in the sitcom Good Times. From 1979 to 1980, she starred in A New Kind of Family as Jojo Ashton, and then joined the cast of Diff'rent Strokes, portraying Charlene Duprey from 1981 to 1982. She played a recurring role during the fourth season of the television series Fame as Cleo Hewitt, though she later commented that the series was not a project she enjoyed working on.

To promote her ninth studio album, 20 Y.O., Jackson appeared on the cover of Us Weekly in June 2006, which became one of the magazine's best-selling issues. Virgin Records released 20 Y.O. in September 2006, which debuted at number two on the Billboard 200. Janine Coveney of Billboard reported the album title, 20 Years Old, represents "a celebration of the joyful liberation and history-making musical style of her 1986 breakthrough album, Control." Rolling Stone magazine's Evan Serpick remarked "the title of Janet Jackson's latest album refers to the two decades since she released her breakthrough, Control, with hits like 'Nasty' and 'What Have You Done for Me Lately.' If we were her, we wouldn't make the comparison."However, Glenn Gamboa of Newsday gave the album a positive rating, stating that "on '20 Y.O.' she skips all that drama of breaking free and asserting herself. She also keeps most of the tie-me-up, tie-me-down sexual raunch of her recent albums in the closet. This album is all about dancing and returning to her R&B roots."

The album's lead single "Call on Me", a duet with rapper Nelly, peaked at number twenty-five on the Hot 100. 20 Y.O. was certified platinum by the RIAA and sold 679,000 copies in the U.S. and 1.2 million worldwide. Billboard magazine reported the release of 20 Y.O. satisfied Jackson's contract with Virgin Records; Jermaine Dupri, who co-produced 20 Y.O., left his position as head of urban music at Virgin following the "disappointing performance" of Jackson's album.

In July 2007, Jackson changed labels and signed a record contract with Island Records. Her tenth studio album, Discipline, was released in February 2008, debuting on the Billboard 200 at number one. Margeaux Watson of Entertainment Weekly remarked, "her boy-crazy lyrics—which often sound like the cheesy text messages of a lovesick adolescent—certainly lack the flavor needed to put this once-celebrated pop star back on top of critics' lists." Andy Kellman of Allmusic expressed: "Janet probably won't hit that late-'80s peak again, but that is no excuse to write her off." Her single, "Feedback", peaked at number nineteen on the Hot 100. In April 2008, Jackson received the Vanguard Award at the 19th Annual GLAAD Media Awards, honoring her contributions in promoting equal rights for LGBT people. GLAAD President Neil G. Giuliano commented, "Ms. Jackson has a tremendous following inside the LGBT community and out, and having her stand with us against the defamation that LGBT people still face in our country is extremely significant." Jackson's fifth concert tour—the Rock Witchu Tour—began in September 2008. That same month, she and her record label parted ways through mutual agreement. Rodney 'Darkchild' Jerkins, who produced the album expressed, "I felt like it wasn't pushed correctly ... She just didn't get her just-do as an artist of that magnitude."In the fourteen months she was associated with Island, her record had sold 449,000 copies and did not receive RIAA certification. Billboard reported that because of Jackson's dissatisfaction with her album's promotion, "the label agreed to dissolve their relationship with the artist at her request."

In June 2009, Jackson's brother Michael died at age 50. At the 2009 BET Awards, she spoke publicly for the first time concerning his death, stating "I'd just like to say, to you, Michael is an icon, to us, Michael is family. And he will forever live in all of our hearts. On behalf of my family and myself, thank you for all of your love, thank you for all of your support. We miss him so much." In an exclusive interview with Harper's Bazaar, she revealed she had first learned of her brother's death while filming on location in Atlanta for Why Did I Get Married Too?. Amidst the public and private mourning with her family, she focused on work to deal with the grief, avoiding any news coverage of her sibling's death; she stated "it's still important to face reality, and not that I'm running, but sometimes you just need to get away for a second."During this time, she also ended her seven year relationship with Jermaine Dupri. In September 2009, she performed "Scream" at the 2009 MTV Video Music Awards as part of a tribute to Michael. MTV General Manager Stephen Friedman stated: "We felt there was no one better than Janet to anchor it and send a really powerful message."She worked with several world renowned choreographers, with her personal creative director, Gil Duldulao, coordinating the performance. It was lauded by several critics and Michael Slezak of Entertainment Weekly commented, "she worked that stage harder than an underpaid assistant doin’ overtime, and as tributes go, this was as energetic as it was heartfelt."

Her single, "Make Me", was released following the VMA performance initially as an audio stream on her official web site, and was later made available for digital download. Soon after its release, the single became Jackson's 19th number one Hot Dance Club Songs chart. Later that month, Jackson chaired the inaugural benefit of amfAR, The Foundation for AIDS Research, held in Milan in conjunction with fashion week. CEO Kevin Robert Frost commented, "we are profoundly grateful to Janet Jackson for joining amfAR as a chair of its first event in Milan ... She brings incomparable grace and a history of dedication to the fight against AIDS."One of the signature pieces sold for the auction was a pair of crystal-studded boots her brother Michael had intended to wear for the This Is It concert tour, which sold for $14,650. The event raised a total of $1.1 million for the nonprofit organization. She stated, "I'd just like to thank everyone here in the global fashion community who've done so much to help amfAR and to support HIV/AIDS research."Her second greatest hits compilation, Number Ones—titled The Best outside of the United States—was released in November, 2009 as a joint venture between Universal Music Enterprises (UMe) and EMI Music. It debuted at number twenty-two on the Billboard 200, selling 37,000 copies in its first week of release.

She performed as the opening act for the 37th annual American Music Awards and as one of the performing acts of the Capital FM December 2009 Jingle Bell Ball at the London O2 arena.

Jackson has changed her lyrical focus over the years, becoming the subject of analysis in musicology, African American studies, and gender studies. Much of her success has been attributed to "a series of powerful, metallic grooves; her chirpy, multi-tracked vocals; and a lyrical philosophy built on pride and self-knowledge."David Ritz stated: "The mystery is the low flame that burns around the perimeters of Janet Jackson's soul. The flame feeds off the most highly combustible elements: survival and ambition, caution and creativity, supreme confidence and dark fear." During the 1980s, her lyrics embodied self-actualization, feminist principles and politically driven ideology. Gillian G. Gaar, author of She's a Rebel: The History of Women in Rock & Roll (2002), described Control as "an autobiographical tale about her life with her parents, her first marriage, and breaking free."Referring to Janet Jackson's Rhythm Nation 1814 as an embodiment of hope, Timothy E. Scheurer, author of Born in the USA: The Myth of America in Popular Music from Colonial Times to the Present (2007) wrote: "It may remind some of Sly Stone prior to There's a Riot Going On and other African-American artists of the 1970s in its tacit assumption that the world imagined by Dr. King is still possible, that the American Dream is a dream for all people."

On Janet, Jackson began to deal primarily with sexual themes. In You've Come A Long Way, Baby: Women, Politics, and Popular Culture (1996), Lilly J. Goren observed that "Jackson's evolution from politically aware musician to sexy diva marked the direction that society and the music industry were encouraging the dance-rock divas to pursue."Joshua Klein wrote in The Washington Post that Jackson's public image over the course of her career had shifted "from innocence to experience, inspiring such carnal albums as 1993's 'Janet' and 1997's 'The Velvet Rope', the latter of which explored the bonds—figuratively and literally—of love and lust."Jackson explained the recurring themes on her later albums by saying, "I love love and I love sex."She stated during promotion for Janet, "I love feeling deeply sexual—and don't mind letting the world know. For me, sex has become a celebration, a joyful part of the creative process." The sexual explicit content of her latter albums have drawn mixed reactions—ranging from acclaim to abhorrence—often in juxtaposition to Madonna, who is seen as her counterpart. Stephen Thomas Erlewine comments "while sex indisputably fuels much great pop music, it isn't an inherently fascinating topic for pop music—as with anything, it all depends on the artist.