Question: Who is the song We Belong Together about by the composer of Oh Santa!?

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: Emotions (Mariah Carey song): "Emotions" became Carey's fifth consecutive number one hit on the U.S. Billboard Hot 100, giving her the distinction of being the first (and, to date, only) act to have their first five singles make number 1 on the Hot 100. (She had previously shared a record of four with The Jackson 5.)  It reached number 1 in its seventh week and spent three weeks at the top, from October 12 to 26, 1991. It replaced "Good Vibrations" by Marky Mark and the Funky Bunch featuring Loleatta Holloway, and was replaced by Karyn White's "Romantic". It remained in the top 40 for 20 weeks and was one of four singles from Carey on the Hot 100's 1991 year-end charts, ranking 22. The song topped the Hot R&B/Hip-Hop Songs chart and became her second number 1 single on the Hot Dance Club Play chart. The RIAA certified it gold.
Document 3: Oh Santa!: The track set a record on the United States "Billboard" Adult Contemporary songs chart, debuting at number twelve and peaking at number one the following week for four weeks. It became the first song to reach the summit in two weeks. It further became Carey's seventh number-one song on the chart. Carey filmed a 1960s style music video to accompany the songs release as a single, and performed it on various programs in the lead up to Christmas, including her own TV special called "Mariah Carey: Merry Christmas to You".
Document 4: 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 5: A Christmas Melody: In September 2015, the Greater Cincinnati & Northern Kentucky Film Commission stated that Carey would be filming in Cincinnati for an upcoming film, Mistletoe & Melody. Carey was confirmed to be serving as the film's director and as one of the film's stars, and Stella Bulochnikov, Jonathan Axelrod, Alan Ett, Eric Jarboe and Kevin Connor were named as the movie's executive producers. Lacey Chabert and Brennan Elliott were also later confirmed as actors for the film, which had been re-titled A Christmas Melody. Child actress Fina Strazza was brought on to play Chabert's daughter and to sing ``Oh Santa! '', which Carey re-wrote for the film. Filming began on October 6, 2015 in Hyde Park and was expected to wrap on October 16, but did not finish until October 26.
Document 6: Adult contemporary music: In recent years it has become common for many AC stations, particularly soft AC stations, to play primarily or exclusively Christmas music during the Christmas season in November and December. While these tend mostly to be contemporary seasonal recordings by the same few artists featured under the normal format, most stations will also air some vintage holiday tunes from older pop, MOR, and adult standards artists – such as Nat King Cole, Bing Crosby, Dean Martin, The Carpenters, Percy Faith, Johnny Mathis and Andy Williams – many of whom would never be played on these stations during the rest of the year.
Document 7: 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 8: 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 9: Adult contemporary music: These Christmas music marathons typically start during the week before Thanksgiving Day and end after Christmas Day, or sometimes extending to New Year's Day. Afterwards, the stations usually resume their normal music fare. Several stations begin the holiday format much earlier, at the beginning of November. The roots of this tradition can be traced back to the beautiful music and easy listening stations of the 1960s and 1970s.
Document 10: 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 11: American Idol: In what was to become a tradition, Clarkson performed the coronation song during the finale, and released the song immediately after the season ended. The single, "A Moment Like This", went on to break a 38-year-old record held by The Beatles for the biggest leap to number one on the Billboard Hot 100. Guarini did not release any song immediately after the show and remains the only runner-up not to do so. Both Clarkson and Guarini made a musical film, From Justin to Kelly, which was released in 2003 but was widely panned. Clarkson has since become the most successful Idol contestant internationally, with worldwide album sales of more than 23 million.
Document 12: Do They Know It's Christmas?: In the United States, the video was played on MTV frequently throughout the Christmas season. Released in the US on 10 December 1984 on Columbia Records, ``Do They Know It's Christmas? ''sold 1.9 million copies in its first eleven days on release but did not reach number 1 there, due to the more complex nature of the chart system, which counted airplay as well as sales. Despite outselling the official number 1 by four to one, it did not make the top ten due to a lack of airplay, ultimately peaking at number 13 on the Billboard Hot 100.
Document 13: 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 14: All I Want for Christmas Is You: ``All I Want for Christmas Is You ''is a Christmas song performed by American singer and songwriter Mariah Carey. She wrote and produced the song with Walter Afanasieff. Columbia Records released it on November 1, 1994, as the lead single from her first holiday album and fourth studio album, Merry Christmas.`` Christmas'' is an uptempo love song that includes bell chimes and heavy back - up vocals, as well as use of synthesizers.
Document 15: 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).
ground_truth: Tommy Mottola
sub_queries: Oh Santa! >> composer Answer: Mariah Carey
who is we belong together by Mariah Carey about Answer: Tommy Mottola