Question: Who does the rap parts in Never Say Never with the singer of Down to Earth?

full_context: Document 1: Never Say Never (Justin Bieber song): ``Never Say Never ''is a song by Canadian recording artist Justin Bieber. The song is used as the theme song for The Karate Kid, and features rap interludes from the film's star, Jaden Smith. Originally a risque demo with sexual lyrics performed by American singer Travis Garland, it was written and produced by The Messengers, and Omarr Rambert. However, for unknown reasons, Bieber was tapped to record the song for the film. He re-wrote the song with The Messengers, Rambert, Smith, and his vocal producer Kuk Harrell, to feature inspirational lyrics to foil the film's theme. The song contains R&B and pop elements while merging hip - hop.
Document 2: Never Say Never (Romeo Void song): "Never Say Never" is a 1982 song by the new wave band Romeo Void. One of their best-known songs, "Never Say Never" was a favorite on early MTV, featuring a black-and-white music video that spoofs Jean-Luc Godard's "Breathless". The song is driven by a throbbing, funky bassline and punctuated by jagged guitar and saxophone, incorporating post-punk influences.
Document 3: All Around the World (Justin Bieber song): "All Around the World" is a song by Canadian singer Justin Bieber, from his third studio album, "Believe" (2012). It was written by Bieber, Sir Nolan and Nasri of The Messengers in collaboration with Ludacris, who guest features. This was the second collaboration between Bieber and Ludacris, having previously collaborated on "Baby" (2010). It was first released on June 4, 2012, as a promotional single from the album. The song was released as the fourth international single, and the fifth and final US single on February 26, 2013. The Eurodance track features a similar instrumentation to songs by Britney Spears, Chris Brown and Usher. Lyrically, it features Bieber singing to his love interest that "all around the world, people want to be loved". "All Around the World" received mostly positive reviews from music critics, who welcomed the song's Eurodance style. The song had moderate success worldwide, reaching the top ten in several countries, such as Belgium, Canada and Norway. Bieber promoted the song through live performances and a music video.
Document 4: Never Say Never (Justin Bieber song): "Never Say Never" is a song by Canadian recording artist Justin Bieber. The song is used as the theme song for "The Karate Kid", and features rap interludes from the film's star, Jaden Smith. Originally a risque demo with sexual lyrics performed by American singer Travis Garland, it was written and produced by The Messengers, and Omarr Rambert. However, for unknown reasons, Bieber was tapped to record the song for the film. He re-wrote the song with The Messengers, Rambert, Smith, and his vocal producer Kuk Harrell, to feature inspirational lyrics to foil the film's theme. The song contains R&B and pop elements while merging hip-hop.
Document 5: What Do You Mean?: ``What Do You Mean? ''is a song recorded by Canadian singer Justin Bieber for his fourth studio album Purpose (2015). The song was released on August 28, 2015, as the album's lead single by Def Jam. Written by Bieber, Jason`` Poo Bear'' Boyd and Mason Levy, the song was produced by MdL and co-produced by Bieber. ``What Do You Mean? ''is a pop and tropical house song, with its instrumentation consisting in light flourishes of panpipes, looped vocal samples, piano chords, fervent synths, bass and`` slick beat'' elements with the sound of a clock ticking, while Bieber uses a smooth, soulful vocal. Lyrically, ``What Do You Mean? ''describes not being able to figure out the opposite sex with Bieber asking a girl why her body language is conflicting with her words.
Document 6: Justin Bieber: On August 17, 2017, Bieber released the single ``Friends ''with American record producer and songwriter BloodPop. Songwriters Julia Michaels and Justin Tranter reunited with Bieber to construct the song, just as they helped create his single`` Sorry'' in 2015 on his studio album Purpose. Bieber did not attend the 2018 Grammy Awards Show to perform the nominated song ``Despacito '', claiming that he would not make any award show appearances until his next album was finished.
Document 7: You're the Best: ``You're the Best ''is a song, performed by Joe Esposito and written by Bill Conti (music) and Allee Willis (lyrics), which came to prominence as the music to the All - Valley Karate Championships montage in the 1984 movie The Karate Kid in which the protagonist, Daniel LaRusso (Ralph Macchio), proves a surprisingly formidable contender.
Document 8: Justin Bieber: Justin Drew Bieber (/ ˈbiːbər /; born March 1, 1994) is a Canadian singer and songwriter. After a talent manager discovered him through his YouTube videos covering songs in 2008 and signed to RBMG, Bieber released his debut EP, My World, in late 2009. It was certified Platinum in the U.S. He became the first artist to have seven songs from a debut record chart on the Billboard Hot 100. Bieber released his first full - length studio album, My World 2.0, in 2010. It debuted at or near number one in several countries, was certified triple Platinum in the U.S., and contained his single ``Baby ''.
Document 9: My Worlds Acoustic: My Worlds Acoustic is the first remix album by Canadian recording artist Justin Bieber. It was released on November 26, 2010 and was initially sold exclusively at Walmart retail stores and Sam's Club. The album features nine acoustic versions of songs from his debut extended play, "My World" (2009), and first album "My World 2.0" (2010), as well as a new song "Pray". The new versions of the songs were produced by Bieber's music director, Dan Kanter, his vocal producer Kuk Harrell, and also producer Rob Wells. Internationally, the set is included as a part of the compilation album, "" (2010), which included songs from the previous two releases. "My Worlds Acoustic" was released to iTunes, on February 8, 2011.
Document 10: One Less Lonely Girl: "One Less Lonely Girl" is a song by Canadian recording artist Justin Bieber. The song was written and produced by Bieber's mentor, Usher, as well as Ezekiel Lewis, Balewa Muhammad of The Clutch, and A-Rex duo Sean Hamilton and Hyuk Shin. It was released exclusively to iTunes as the second single from his debut release, "My World" on October 6, 2009, and was later released to more digital distributions and mainstream and rhythmic radio soon after.
Document 11: Favorite Girl: "Favorite Girl" is a song by Canadian recording artist, Justin Bieber. The song was written and produced by D'Mile, and Antea Birchett, Anesha Birchett, and Delisha Thomas also receive writing credits. Bieber debuted the acoustic version of his song in his official YouTube account after American country pop singer Taylor Swift used Bieber's single "One Time" as background music in one of her video tour diaries. The song was later released exclusively to iTunes as the second promotional single from his debut studio release, "My World" on November 4, 2009.
Document 12: Down to Earth (Justin Bieber song): "Down to Earth" is a song by Canadian recording artist Justin Bieber, included as a track on his debut release, "My World", released on November 17, 2009. It was written by Bieber, who was assisted by Carlos and Steven Battey of The Jackie Boyz, as well as the song's producers, Mason "MdL" Levy, and Kevin Risto and Waynne Nugent of Midi Mafia. "Down to Earth" is a teen pop song, with lyrics that were inspired by the divorce of Bieber's parents. It also contains lyrical content about growing up. The song received positive reviews from critics, who embraced the song as a shift in the puppy love content of the album. After the release of My World, due to digital sales, the song charted in the lower regions of charts in the United States, Canada, and the United Kingdom.
Document 13: Baby (Justin Bieber song): The song is predominantly upbeat, featuring Bieber's R&B vocals over a backdrop containing a dance infused beat, full of keyboard and ``disco string ''synths. The song is composed in the key of E ♭ major with Bieber's vocal range spanning from the low - note of G to the high - note of C. According to Jody Rosen of Rolling Stone, the song`` blends winks at Fifties doo - wop with hip - hop chants'', comparing the style and the lyrics ``My first love broke my heart for the first time / And I was like / Baby, baby, baby, ooooh / I thought you'd always be mine ''to fifties ballads like`` Tears on My Pillow'', ``Why Do Fools Fall in Love ''and`` Earth Angel''. Lyrically, Bieber's lines explain his distress over his lost love, and promise to get it back, featured in lines like, ``And I wan na play it cool / But I'm losin 'you... / I'm in pieces / So come and fix me... ''. The chorus features the distinct and repetitive`` baby, baby, baby, ohhhh (nooooo)'' hook. After the second verse, Ludacris comes in with the verse - rap, an anecdote of young love when he was thirteen, as it runs ``When I was 13 / I had my first love / She had me going crazy / Oh, I was star - struck / She woke me up daily / Do n't need no Starbucks... ''.
Document 14: Baby (Justin Bieber song): Filming for the music video began during the week of January 25, 2010, in Los Angeles. It was filmed at Universal CityWalk by director Ray Kay, who had previously directed videos for Beyoncé Knowles, Lady Gaga, Alexandra Burke, and Cheryl Cole, among others. Ludacris said that the video ``is like a 2010 version of Michael Jackson's`` The Way You Make Me Feel ''.'' Bieber said that the video ``will capture the song's message of trying to woo back a girl. ''In explaining the concept of the video, Bieber said,`` It starts off, I really like this girl, but we did n't (get) along; we could n't be together. Basically I want her back and (I'm) kind of going through the whole thing. I'm chasing her around, trying to get her, and she's kind of playing hard to get, but I'm persistent. I keep going.'' The video premiered exclusively on Vevo on Friday, February 19, 2010. Singer and actress Jasmine Villegas portrays Bieber's love interest in the video. Bieber's friends, Young Money artists Drake and Lil Twist also appeared in the video, along with Tinashe and jerkin 'crew The Rangers.
Document 15: Justin Bieber: Justin Drew Bieber (/ ˈbiːbər /; born March 1, 1994) is a Canadian singer, actor and songwriter. After a talent manager discovered him through his YouTube videos covering songs in 2008 and he signed to RBMG, Bieber released his debut EP, My World, in late 2009. It was certified platinum in the U.S. He became the first artist to have seven songs from a debut record chart on the Billboard Hot 100. Bieber released his first full - length studio album, My World 2.0, in 2010. It debuted at or near number one in several countries, was certified triple platinum in the U.S., and contained his single ``Baby ''.
ground_truth: Jaden Smith
sub_queries: Down to Earth >> performer Answer: Justin Bieber
who sings never say never with Justin Bieber Answer: Jaden Smith