Question: Who is We Belong Together by the I'm That Chick performer about?

full_context: Document 1: Katy Perry: Part of Me: The film features interviews with Perry and her loved ones documenting the trajectory of her life, containing various clips from her childhood and teenage years as well as her career and personal life. The film is spliced with performances from her worldwide California Dreams Tour, which had 127 concerts from February 20, 2011 to January 22, 2012. Most of the performances were recorded on November 23, 2011, at the Staples Center in Los Angeles, but also included performances in Tokyo and São Paulo. Some of her friends such as Rihanna, Lady Gaga, Adele and Jessie J make cameos in the film. The documentary includes scenes of Perry dealing with the breakdown of her marriage with English actor/comedian Russell Brand.
Document 2: You Belong with Me: The song's accompanying music video was directed by Roman White. The video featured Swift portraying two characters, a nerd (the protagonist and narrator) and a popular girl (the antagonist and girlfriend), while American actor Lucas Till portrayed the male lead. The video's plot centers on the protagonist secretively loving the male lead, although he has a girlfriend. The video won the MTV Video Music Award for Best Female Video at the 2009 MTV Video Music Awards, but during Swift's acceptance speech, rapper Kanye West interrupted, protesting in support of Beyoncé. The incident caused a reaction in the media, with many coming to Swift's defense. The song was performed live at numerous venues, including the 2009 -- 10 Fearless Tour, where it was the opening number. It was covered by various artists, including Butch Walker and Selena Gomez & the Scene, and parodied by ``Weird Al ''Yankovic.
Document 3: Can't Take That Away (Mariah's Theme): "Can't Take That Away (Mariah's Theme)" is a song by American singer and songwriter Mariah Carey. It was released by Columbia Records on June 6, 2000, written by Carey and Diane Warren, and produced by Carey and Jimmy Jam and Terry Lewis for Carey's seventh studio album "Rainbow" (1999). It was released as the album's third single and a double A-side with "Crybaby". The song is a ballad, blending pop and R&B beats while incorporating its sound from several instruments including the violin, piano and organ. Lyrically, the song speaks of inner strength, and not allowing others to tear away your dreams.
Document 4: Upgrade U: The music video for the song was directed by Melina Matsoukas, and took one and a half days of shooting. Knowles did an impersonation of Jay-Z in the clip and is also seen amidst gold watches and jewelry, continuing the motif of luxury that is alluded to in the song. It finally emerged as the forty-fifth best R&B/Hip-Hop song of 2007 in the United States. Although Knowles did not perform "Upgrade U" in any televised appearances, the song was a part of her set list on The Beyoncé Experience tour (2007), and I Am... Tour (2009–10), as well as her and Jay Z's joint On the Run Tour (2014).
Document 5: Touch My Body: Carey achieved critical and commercial success with her tenth studio album, "The Emancipation of Mimi" (2005). and the second best-seller around the world, It earned a myriad of music industry awards, and brought Carey back to the top of pop music following her decline in 2001. After completing The Adventures of Mimi Tour, Carey began working on material for her eleventh studio effort, the yet untitled "E=MC²" (2008). "E=MC²" was hailed as one of the most anticipated albums of 2008, with many critics weighing their opinions on whether Carey would be able to deliver significant success, following her achievements with "The Emancipation of Mimi". "Touch My Body" was eventually chosen as the lead single through a vote in between the record executives at Island Records, with the final choices being the former and "I'm That Chick" (titled "I'm That Chick You Like" at that point). After choosing the former, the song was sent to radio stations worldwide on February 12, 2008 and to digital outlets on March 24, 2008.
Document 6: We Belong Together: The song's music video was filmed as a two - part story with ``It's Like That '', which featured Carey at her bachelorette party. The video for`` We Belong Together'' is a continuation focusing on Carey's wedding to an older and powerful man and ends with the singer eloping with her ex-lover. Rumors arose of the video's connection to her 1993 marriage to Tommy Mottola. Carey performed the song on several award shows and television appearances around the world, namely MTV Movie Awards, MTV Video Music Awards, Macy's Fourth of July Parade, The Oprah Winfrey Show and the 48th Grammy Awards. In Europe the song was performed at the Live 8 charity concert, the Fashion Rocks in Monaco, and the German Bambi Awards. Carey performed the song on both her Adventures of Mimi and Angels Advocate Tours.
Document 7: Beyoncé: Beyoncé is believed to have first started a relationship with Jay Z after a collaboration on "'03 Bonnie & Clyde", which appeared on his seventh album The Blueprint 2: The Gift & The Curse (2002). Beyoncé appeared as Jay Z's girlfriend in the music video for the song, which would further fuel speculation of their relationship. On April 4, 2008, Beyoncé and Jay Z were married without publicity. As of April 2014, the couple have sold a combined 300 million records together. The couple are known for their private relationship, although they have appeared to become more relaxed in recent years. Beyoncé suffered a miscarriage in 2010 or 2011, describing it as "the saddest thing" she had ever endured. She returned to the studio and wrote music in order to cope with the loss. In April 2011, Beyoncé and Jay Z traveled to Paris in order to shoot the album cover for her 4, and unexpectedly became pregnant in Paris.
Document 8: Heartbreaker (Mariah Carey song): Carey performed "Heartbreaker" live on several television and award show appearances around the world, as well as on her concert tours. The accompanying music video for "Heartbreaker", directed by Brett Ratner, is one of the most expensive ever made, costing over $2.5 million. The video features Carey and her friends visiting a film theater and catching her boyfriend (played by Jerry O'Connell) on a date with another woman. Carey played herself and a brunette villainess named Bianca, during a physical altercation scene in between the two women. Due to contractual agreements at the time of its filming, Jay-Z was unable to make an appearance in the video, instead being portrayed as an animated cartoon. The video was inspired by several films, including "Grease" and "Enter the Dragon".
Document 9: E=MC² (Mariah Carey album): E=MC² is the eleventh studio album by American singer and songwriter Mariah Carey. It was released in the United States on April 15, 2008 by Island Records. The singer began recording the album in 2007 in Anguilla, after writing and composing most of its material during and after her 2006 Adventures of Mimi Tour. Carey worked with several notable songwriters and producers during the course of the project, including Jermaine Dupri, Bryan-Michael Cox, Stargate, The-Dream, Tricky Stewart, Scott Storch and Danja.
Document 10: I'm That Chick: "I'm That Chick" is a song by American singer and songwriter Mariah Carey from her eleventh studio album, "E=MC²" (2008). A disco track with influences of R&B, it was written by Carey, Johntá Austin and production duo Stargate (Mikkel S. Eriksen and Tor E. Hermansen). It contains elements of "Off the Wall" by Michael Jackson. Rod Temperton, the songs composer, received a songwriting for "I'm That Chick" as result.
Document 11: It's Like That (Mariah Carey song): "It's Like That" is a song recorded by American singer and songwriter Mariah Carey for her tenth studio album, "The Emancipation of Mimi" (2005). Written by Carey, Jermaine Dupri, Manuel Seal, and Johntá Austin, and produced by Carey, Dupri, and Seal, the song borrows the hook "It's Like That Y'all" from the Run–D.M.C. tracks "Hollis Crew" and "Here We Go (Live)". Several other tracks were contenders for the album's lead single. However, plans were changed when Island Def Jam Music head L.A. Reid suggested to Carey she record a few more strong songs to ensure the album's success, therefore "It's Like That" was written and chosen as the album's lead single, being released on January 25, 2005.
Document 12: Madonna (entertainer): From the beginning of 2014, Madonna began to make multiple media appearances. She appeared at the 56th Annual Grammy Awards in January 2014, performing "Open Your Heart" alongside rappers Macklemore & Ryan Lewis and singer Mary Lambert, who sang their single "Same Love", as 33 couples were wed onstage, officiated by Queen Latifah. Days later, she joined singer Miley Cyrus on her MTV Unplugged special, singing a mash-up of "Don't Tell Me" and Cyrus' single "We Can't Stop" (2013). She also extended her business ventures and in February 2014 the singer premiered MDNA Skin, a range of skin care products, in Tokyo, Japan. After visiting her hometown of Detroit during May 2014, Madonna decided to contribute funds to three of the city's organizations, to help eliminate poverty from there. The singer released a statement saying that she was inspired by their work, adding that "it was obvious to me that I had to get involved and be part of the solution to help Detroit recover".
Document 13: I'll Be Lovin' U Long Time: "I'll Be Lovin' U Long Time" is a song by American singer and songwriter Mariah Carey, taken from her eleventh studio album, "E=MC²" (2008). It was written by Carey, Aldrin Davis, Crystal Johnson and Clifford Harris, and produced by the former two. As the song's hook and instrumentation is derived from sampling DeBarge's "Stay with Me", Mark DeBarge and Etterlene Jordan also share songwriting credits. "I'll Be Lovin' U Long Time" was released as the album's third single in the United States, Australasia and select European countries on July 1, 2008. Drawing influence from pop, soul and R&B music genres, and featuring a piano and keyboard-driven melody, the song's lyrics demonstrate the lengths the protagonist will go for her lover, and how she will be 'lovin' him long time'.
Document 14: We Are Never Ever Getting Back Together: The video, which is done seemingly as one continuous shot, begins with Swift in colorful pajamas recounting the events of her off and on again relationship with her ex-boyfriend (played by Noah Mills). The video then segues into Swift going into her living room where her band is dressed up in animal costumes and Swift belts out the chorus of the song. The video then goes to a TV where Swift says ``Like, ever. ''and then to the dining room where we see she returns to recounting the events of her relationship and receives a phone call from her ex who is calling her from a nightclub. Swift hangs up on him and he walks off screen into the nightclub. It then goes to the two in a truck having an argument then to them having a stroll in the park. Swift then runs off and we see her on the phone telling the person on the other line how she and her ex are not getting back together and her frustration of their entire relationship. The video then segues back to Swift's living room where a party is going on and her ex shows up unannounced trying to woo her back and she slams the door in his face. The video ends with Swift on her window ledge where she was at the beginning of the video, singing the last line of the song.
Document 15: 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.
ground_truth: Tommy Mottola
sub_queries: I'm That Chick >> performer Answer: Mariah Carey
who is we belong together by Mariah Carey about Answer: Tommy Mottola