Question: How many seasons was the performer of Forever a judge on American Idol?

full_context: Document 1: Forever (Crystal Kay song): 'Forever' is the third single to be released from J-Pop/R&B singer Crystal Kay's 10th Japanese full-length studio album Vivid. 'Forever' is also the third single Kay has released under her new record company Universal after leaving Sony Music Japan her label of 12 years.
Document 2: Emotions (Mariah Carey album): Emotions is the second studio album by American singer and songwriter Mariah Carey. It was released on September 17, 1991 by Columbia Records. The album deviated from the formula of Carey's 1990 self-titled debut album, as she had more creative control over the material she produced and recorded. Additionally, "Emotions" features influences from a range of genres such as gospel, R&B, soul and 1950s, 1960s and 1970s balladry infusion. On the record, Carey worked with a variety of producers and writers, including Walter Afanasieff, the only hold over from her previous effort. Additionally, Carey wrote and produced the album's material with Robert Clivillés and David Cole from C+C Music Factory and Carole King, with whom she wrote one song.
Document 3: Rainbow (Mariah Carey album): Rainbow is the seventh studio album by American singer and songwriter Mariah Carey. It was released on November 2, 1999, by Columbia Records. The album followed the same pattern as Carey's previous two albums, "Daydream" (1995) and "Butterfly" (1997), in which she began her transition into the urban market. "Rainbow" contains a mix of hip hop-influenced R&B jams, as well as a variety of slow ballads. On the album, Carey worked with David Foster and Diane Warren, who, as well as Jimmy Jam & Terry Lewis, replaced Walter Afanasieff, the main balladeer Carey worked with throughout the 90s. As a result of her separation from her husband, Tommy Mottola, Carey had more control over the musical style of this album, so she collaborated with several artists such as Jay-Z, Usher, and Snoop Dogg, as well as Missy Elliott, Joe, Da Brat, Master P, 98°, and Mystikal.
Document 4: Yours Forever: Yours Forever is the fifth studio album by American band Atlantic Starr. This album features the hit single "Touch a Four Leaf Clover." "Yours Forever" was the last album to feature Sharon Bryant as a lead vocalist before she departed the group to pursue a solo career. This was also the last album to be produced by James Anthony Carmichael, who was responsible for the group's two previous albums.
Document 5: American Idol: Season 12 premiered on January 16, 2013. Judges Jennifer Lopez and Steven Tyler left the show after two seasons. This season's judging panel consisted of Randy Jackson, along with Mariah Carey, Keith Urban and Nicki Minaj. This was the first season since season nine to have four judges on the panel. The pre-season buzz and the early episodes of the show were dominated by the feud between the judges Minaj and Carey after a video of their dispute was leaked to TMZ.
Document 6: American Idol: In season eight, Latin Grammy Award-nominated singer–songwriter and record producer Kara DioGuardi was added as a fourth judge. She stayed for two seasons and left the show before season ten. Paula Abdul left the show before season nine after failing to agree terms with the show producers. Emmy Award-winning talk show host Ellen DeGeneres replaced Paula Abdul for that season, but left after just one season. On January 11, 2010, Simon Cowell announced that he was leaving the show to pursue introducing the American version of his show The X Factor to the USA for 2011. Jennifer Lopez and Steven Tyler joined the judging panel in season ten, but both left after two seasons. They were replaced by three new judges, Mariah Carey, Nicki Minaj and Keith Urban, who joined Randy Jackson in season 12. However both Carey and Minaj left after one season, and Randy Jackson also announced that he would depart the show after twelve seasons as a judge but would return as a mentor. Urban is the only judge from season 12 to return in season 13. He was joined by previous judge Jennifer Lopez and former mentor Harry Connick, Jr.. Lopez, Urban and Connick, Jr. all returned as judges for the show's fourteenth and fifteenth seasons.
Document 7: American Idol: The top 12 finalists originally included Mario Vazquez, but he dropped out citing 'personal reasons' and was replaced by Nikko Smith. Later, an employee of Freemantle Media, which produces the show, sued the company for wrongful termination, claiming that he was dismissed after complaining about lewd behavior by Vazquez toward him during the show.
Document 8: American Idol: Towards the end of the season, Randy Jackson, the last remaining of the original judges, announced that he would no longer serve as a judge to pursue other business ventures. Both judges Mariah Carey and Nicki Minaj also decided to leave after one season to focus on their music careers.
Document 9: Someday (Mariah Carey song): "Someday" is a song by American singer and songwriter Mariah Carey from her self-titled debut studio album (1990). It is a dance-pop song with new jack swing influences. Prior to Carey signing a record contract, she and producer Ben Margulies had written and produced a four-track demo which included "Someday". After signing a contract with Columbia Records, Carey began work on her debut album and she reached out to Ric Wake to ask if he would produce the song, to which he agreed. The composition of the demo recording was changed during the recording process, most notably replacing the horns with a guitar, which Carey disapproved of.
Document 10: American Idol: American Idol employs a panel of judges who critique the contestants' performances. The original judges were record producer and music manager Randy Jackson, pop singer and choreographer Paula Abdul and music executive and manager Simon Cowell. The judging panel for the most recent season consisted of country singer Keith Urban, singer and actress Jennifer Lopez, and jazz singer Harry Connick, Jr. The show was originally hosted by radio personality Ryan Seacrest and comedian Brian Dunkleman, with Seacrest continuing on for the rest of the seasons.
Document 11: Forever (Mariah Carey song): "Forever" is a song by American singer and songwriter Mariah Carey from her fifth studio album, "Daydream". It was released by Columbia Records on March 10, 1996, as an airplay-only single from the album. The song was written and produced by Carey and Walter Afanasieff, and was composed throughout 1995. Its lyrics describe a situation where the protagonist knows her relationship with her lover has withered away, however he will continue living in her memory forever.
Document 12: Underneath the Stars (song): "Underneath the Stars" is a song by American singer and songwriter Mariah Carey. The romance song was written and produced by Carey and Walter Afanasieff, for her fifth studio album, "Daydream" (1995). It was released on April 5, 1996 through Columbia Records, as the sixth and final single from the album, and as a B-side to "Forever" in Australia. The R&B-influenced song, which has been considered by Carey as one of her personal favorites, features a soft melody and retro-style melody, and had music critics drawing comparisons to earlier works from one of her vocal inspirations, Minnie Riperton.
Document 13: American Idol: The thirteenth season premiered on January 15, 2014, with Ryan Seacrest returning as host. Randy Jackson and Keith Urban returned, though Jackson moved from the judging panel to the role of in-mentor. Mariah Carey and Nicki Minaj left the panel after one season. Former judge Jennifer Lopez and former mentor Harry Connick, Jr. joined Urban on the panel. Also, Nigel Lythgoe and Ken Warwick were replaced as executive producers by Per Blankens, Jesse Ignjatovic and Evan Pragger. Bill DeRonde replaced Warwick as a director of the audition episodes, while Louis J. Horvitz replaced Gregg Gelfand as a director of the show.
Document 14: American Idol: The show had originally planned on having four judges following the Pop Idol format; however, only three judges had been found by the time of the audition round in the first season, namely Randy Jackson, Paula Abdul and Simon Cowell. A fourth judge, radio DJ Stryker, was originally chosen but he dropped out citing "image concerns". In the second season, New York radio personality Angie Martinez had been hired as a fourth judge but withdrew only after a few days of auditions due to not being comfortable with giving out criticism. The show decided to continue with the three judges format until season eight. All three original judges stayed on the judging panel for eight seasons.
Document 15: American Idol: Much media attention on the season had been focused on the three black singers, Fantasia Barrino, LaToya London, and Jennifer Hudson, dubbed the Three Divas. All three unexpectedly landed on the bottom three on the top seven result show, with Hudson controversially eliminated. Elton John, who was one of the mentors that season, called the results of the votes "incredibly racist". The prolonged stays of John Stevens and Jasmine Trias in the finals, despite negative comments from the judges, had aroused resentment, so much so that John Stevens reportedly received a death threat, which he dismissed as a joke 'blown out of proportion'.
ground_truth: one
sub_queries: Forever >> performer Answer: Mariah Carey
How many seasons was Mariah Carey a judge on American Idol? Answer: one