Question: When did the performer of Radar release her first album?

full_context: Document 1: Gimme More: "Gimme More" is a song recorded by American singer Britney Spears for her fifth studio album, "Blackout" (2007). It was released on September 20, 2007 by Jive Records as the lead single from the album. "Gimme More" was recorded in 2006 during Spears' second pregnancy, and was one of the first solo productions by Danja. The song opens with an intro in which Spears utters the phrase "It's Britney, bitch". Musically, "Gimme More" is a dance-pop and electropop song with breathy vocals. The track closes with a speak-sing outro by Danja.
Document 2: Oops!... I Did It Again (song): ``Oops!... I Did It Again ''Single by Britney Spears from the album Oops!... I Did It Again B - side`` Deep in My Heart'' Released March 27, 2000 (2000 - 03 - 27) Format Cassette single CD single 12 ''Recorded November 1999 Cheiron Studios (Stockholm) Battery Studios (New York) Genre Teen pop dance - pop Length 3: 31 Label Jive Songwriter (s) Max Martin Rami Producer (s) Max Martin Rami Britney Spears singles chronology ``From the Bottom of My Broken Heart'' (1999)`` Oops!... I Did It Again ''(2000) ``Lucky'' (2000)`` From the Bottom of My Broken Heart ''(1999) ``Oops!... I Did It Again'' (2000)`` Lucky ''(2000) Music video ``Oops!... I Did It Again'' on YouTube
Document 3: Circus (song): "Circus" is a song recorded by American singer Britney Spears for her sixth studio album of the same name (2008). It was released on December 2, 2008 (Spears' 27th birthday), by Jive Records as the second single from the album. Written by Dr. Luke, Claude Kelly and Benny Blanco, "Circus" is a metaphor for the public's perception of Spears' life. After she listened to the track for the first time, she felt inspired to create an album and a tour with a circus theme. "Circus" is an uptempo electropop and dance-pop song with elements of pop rock and "half-rapped" vocals. The song's lyrics talk about being an entertainer and putting on shows.
Document 4: Radar (song): "Radar" is a song recorded by American singer Britney Spears for her fifth studio album, "Blackout" (2007). It was written and produced by Bloodshy & Avant and The Clutch, with additional writing from Henrik Jonback, as a record that did not relate to any of her personal problems at the time. The recording sessions took place the day after Spears filed for divorce from Kevin Federline, and members of The Clutch claimed to be surprised by her work ethic. "Radar" was originally planned to be released as the third single from "Blackout", but "Break the Ice" was chosen instead. The song was then planned as the fourth single, but the release was cancelled as Spears began recording her sixth studio album, "Circus" (2008). "Radar" was later included as a bonus track on "Circus", and released as the fourth and final single from the album on June 22, 2009 by Jive Records.
Document 5: Britney Spears: Britney Jean Spears (born December 2, 1981) is an American singer, dancer, and actress. Born in McComb, Mississippi, and raised in Kentwood, Louisiana, she performed acting roles in stage productions and television shows as a child before signing with Jive Records in 1997. Spears's first and second studio albums,... Baby One More Time (1999) and Oops!... I Did It Again (2000), became international successes, with the former becoming the best - selling album by a teenage solo artist. Title tracks ``... Baby One More Time ''and`` Oops!... I Did It Again'' broke international sales records. In 2001, Spears released her self - titled third studio album, Britney, and played the starring role in the film Crossroads (2002). She assumed creative control of her fourth studio album, In the Zone (2003), which yielded the worldwide success of the single ``Toxic ''.
Document 6: Beyoncé: Beyoncé Giselle Knowles - Carter (/ biːˈjɒnseɪ /; born September 4, 1981) is an American singer, songwriter, actress, and businesswoman. Born and raised in Houston, Texas, Beyoncé performed in various singing and dancing competitions as a child. Beyoncé rose to fame in the late 1990s as lead singer of the R&B girl - group Destiny's Child. Managed by her father, Mathew Knowles, the group became one of the world's best - selling girl groups in history. Their hiatus saw Beyoncé's theatrical film debut in Austin Powers in Goldmember (2002) and the release of her debut album, Dangerously in Love (2003). The album established her as a solo artist worldwide, earned five Grammy Awards, and featured the Billboard Hot 100 number one singles ``Crazy in Love ''and`` Baby Boy''.
Document 7: Womanizer (song): "Womanizer" is a song recorded by American singer Britney Spears for her sixth studio album, "Circus" (2008). It was released on October 3, 2008 by Jive Records as the lead single of the album. Produced and written by The Outsyders, the song was re-recorded after a snippet was leaked onto the internet. "Womanizer" is an up-tempo electropop and dance-pop song. Described by Spears as a girl anthem, the song's lyrics recall a womanizing man, while the protagonist of the song makes clear she knows who he really is. Music critics mostly praised its hook, melody and empowering lyrics. Critics also observed it was a stand-out track from its album and also deemed it as a comeback single for Spears.
Document 8: Femme Fatale (Britney Spears album): Femme Fatale is the seventh studio album recorded by American singer Britney Spears. It was released on March 25, 2011 through Jive Records and was her last album with the label before they shutdown later that year as she was moved to RCA Records. Musically, Spears wanted to make a "fresh-sounding" and "fierce dance album", thus incorporating dance-pop and electropop styles with elements of dubstep, techno, and electro in its sound. Spears began working on the album during the second leg of her tour The Circus Starring Britney Spears (2009), while also contributing to her second greatest hits album "The Singles Collection" (2009). The singer collaborated with various producers on "Femme Fatale", including Max Martin, Dr. Luke, William Orbit, Fraser T Smith, Rodney Jerkins, Bloodshy & Avant, will.i.am, and Stargate.
Document 9: Out from Under: "Out from Under" is a song by American recording artist Britney Spears, taken from her sixth studio album, "Circus" (2008). The song was written by Shelly Peiken, Arnthor Birgisson, and Wayne Hector, initially for , featuring vocals of American recording artist Joanna Pacitti. After approaching Spears and Guy Sigsworth in 2008, the songwriters suggested the singer to re-record the song for her album. "Out from Under" is a soft rock song that alludes to the ending of Spears' marriage with Kevin Federline, and blends the singer's breathy vocals with acoustic guitars in the background.
Document 10: I'm Not a Girl, Not Yet a Woman: "I'm Not a Girl, Not Yet a Woman" is a song recorded by American singer Britney Spears for her third studio album, Britney (2001). It was written and produced by Max Martin and Rami, with additional writing from Dido. The song was released on February 18, 2002, by Jive Records. In the United States and Canada, the song was released as the second single from her third studio album Britney; internationally, it served as the third. "I'm Not a Girl, Not Yet a Woman" is a song that speaks about the angst and heartache of adolescence. Spears considered the song inspirational and one of her favorite songs to perform.
Document 11: ...Baby One More Time (song): ``... Baby One More Time ''Single by Britney Spears from the album... Baby One More Time B - side`` Autumn Goodbye'' Released September 30, 1998 Format Cassette single CD single 12 ''Recorded 1998; Cheiron Studios (Stockholm, Sweden) Genre Teen pop dance - pop Length 3: 31 Label Jive Songwriter (s) Max Martin Producer (s) Max Martin Rami Britney Spears singles chronology ``... Baby One More Time'' (1998)`` Sometimes ''(1999) ``... Baby One More Time'' (1998)`` Sometimes ''(1999) Music video ``... Baby One More Time'' on YouTube
Document 12: Someday (I Will Understand): "Someday (I Will Understand)" is a song recorded by American singer Britney Spears. It was written by Spears and produced by Guy Sigsworth. The song was released on August 18, 2005, by Jive Records, as the sole single from Spears' first extended play, "" (2005). In July 2004, Spears announced her engagement to American dancer Kevin Federline, later revealing she would be taking another career break to start a family. Spears wrote the song two weeks before knowing she was pregnant with her first child, Sean Preston Federline. A pop ballad, "Someday (I Will Understand)" lyrics refer to a feeling of empowerment as a pregnant woman. A remixed version of the song was included on the 2005 remix compilation, "".
Document 13: Do Somethin': "Do Somethin" is a song recorded by American singer Britney Spears for her first greatest hits album, "" (2004). It was written and produced by Christian Karlsson and Pontus Winnberg (known collectively as Bloodshy & Avant), with additional writing by Henrik Jonback and Angela Hunte. Before the song was given to Spears, it was originally offered to girl group Melodi Brown, although they never released the song or indeed any material. The song was never intended to be released as a single. Spears, however, wanted to shoot a music video for it, and had to convince her record company. It was then released on February 14, 2005 by Jive Records as the second single from the album worldwide except North America. The dance-pop song features usage of electric guitars, and its lyrics allude to having a good time and not caring about other people's judgement.
Document 14: Stronger (Britney Spears song): "Stronger" is a song recorded by American singer Britney Spears for her second studio album, "Oops!... I Did It Again" (2000). It was released on November 13, 2000, by Jive Records as the third single of the album. After meeting with producers Max Martin and Rami in Sweden, the singer recorded several songs for the album, including "Stronger". The teen pop and dance-pop song has self-empowerment lyrics about a girl who is tired of her cheating boyfriend and decides to live without him. It received acclaim from music critics, who described the song as both musically and lyrically innovative and considered it the best dance track from the album.
Document 15: Oops!... I Did It Again (song): ``Oops!... I Did It Again ''is a song by American singer Britney Spears, from her second album of the same name. It was released on March 27, 2000, by Jive Records as the lead single from the album. The song was written and produced by Max Martin and Rami Yacoub.`` Oops!... I Did It Again'' is a song that lyrically speaks of a female who views love as a game, and she decides to use that to her advantage by playing with her lover's emotions. Its bridge features a dialogue which references the blockbuster film Titanic (1997).
ground_truth: 1999
sub_queries: Radar >> performer Answer: Britney Spears
when did Britney Spears release her first album Answer: 1999