paragraph_text: The Live Earth concert in Antarctica was held at Rothera Research Station, one in a series of Live Earth concerts that took place on July 7, 2007, in all seven continents. The band Nunatak performed as the lone act. Nunatak's performances, though performed in front of only 17 people, were broadcast all over the world. It was the first rock concert ever performed in Antarctica.

paragraph_text: ``Sing for the Moment ''contains samples of the song`` Dream On'' by the rock band Aerosmith. Joe Perry plays the guitar solo at the end of the song, and a sample of Steven Tyler singing is used as the chorus for this song. Eminem chants ``sing ''when Tyler starts to sing the chorus, and Eminem also chants`` sing with me'' and ``come on ''. Eminem says the words in his live performances as well. The beginning of the song samples the intro of`` Dream On''. ``Sing for the Moment ''was later released on Eminem's greatest hits compilation album Curtain Call: The Hits (2005).

paragraph_text: ``I Like It ''is a Latin trap number. It is a blend of trap and salsa, and samples 1960s boogaloo song`` I Like It Like That''. As noted by a Billboard editor, the song is ``heavily indebted to the world of Latin hip hop. ''Bad Bunny raps in English and Spanish, while J Balvin performs in Spanish.

paragraph_text: 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... ''.

paragraph_text: Planet Ultra is the fourth studio album by Dutch band Urban Dance Squad. Released in 1996, the album marked another stylistic change for the band after their hard rock and heavy metal based previous album "Persona Non Grata". Though DJ DNA had not yet returned by this point, the band once again made use of turntables on this album. There are also many songs on the album that feature singing instead of rapping by vocalist Rudeboy.

paragraph_text: Brasse Vannie Kaap (BVK) was a hip-hop group that hailed from the Cape Flats in Cape Town, South Africa. They rapped in predominantly in the Cape Flats dialect of Afrikaans. The original line-up included Deon Daniels (Boeta-D), Roger Heunis (Hamma), Ashley Titus (Mr Fat) and Enver Pietersen (DJ E20). Bboys Cheeze, Baby-L and Levi joined the group soon after they started to perform live.

paragraph_text: Bryan Mahoney, best known by his stage name, Big B, is an American rapper currently signed with Suburban Noize Records as a solo artist. Along with John E. Necro, he performs vocals in the rap rock band OPM, which is also signed with Subnoize.

paragraph_text: "Xxplosive" is a song by Dr. Dre from his album 2001. The song is number 6 in the track listing of the album. "Xxplosive" features Kurupt, Hittman, and Six-Two on the verses and Nate Dogg singing the chorus. The track is heavily based upon the song "Bumpy's Lament" by Soul Mann & The Brothers.The original title of the song was "The Way I Be Pimpin," which featured Royce da 5'9" on the chorus and Dre rapping the verses.

paragraph_text: Hi-Teknology is the debut album from producer Hi-Tek, released on Rawkus Records. Most songs feature rapping or singing by other artists, and all are produced by Hi-Tek. A sequel, "Hi-Teknology 2", was made for MCA Records but never released; a second "Hi-Teknology 2" was recorded and released on Babygrande Records.

paragraph_text: "Let the Heartaches Begin" is a song performed by British singer Long John Baldry. The single was a number one hit in the UK Singles Chart on 22 November 1967 where it stayed for two weeks. It was the second of two consecutive UK number one hits for the writing partnership of Tony Macaulay and John Macleod, the first being "Baby Now That I've Found You" by The Foundations. Macaulay says of the recording session "Long John Baldry sings it extraordinarily well, thanks to three-quarters of a bottle of Courvoisier".

paragraph_text: "Crazy Rap", also known as "Colt 45 and 2 Zig Zags" or simply "Colt 45", is a dirty rap single recorded by rapper Afroman. It was featured on his third album, "Sell Your Dope", and was later included on his greatest hits album, "The Good Times". It is often referred to as "Colt 45", as the hook states "Colt 45 and two zig-zags, baby that's all we need". The song failed to replicate the success of its predecessor but it nonetheless still charted across Europe, reaching the top 10 in the UK.

paragraph_text: ``One for My Baby (and One More for the Road) ''is a hit song written by Harold Arlen and Johnny Mercer for the movie musical The Sky's the Limit (1943) and first performed in the film by Fred Astaire. It was popularized by Frank Sinatra.

paragraph_text: ``I Still Call Australia Home ''is a song written and performed by Peter Allen in 1980. In it, Allen sings of Australian expatriates' longing for home.

paragraph_text: The eighth series was won by boy band Collabro, with opera singer Lucy Kay finishing in second place and singing / rapping duo Bars and Melody in third place. During its broadcast, the series averaged around 9.8 million viewers.

paragraph_text: "How Long Will My Baby Be Gone" is a 1968 song written and recorded by Buck Owens. "How Long Will My Baby Be Gone" was the last of eight number ones on the country chart in a row for Buck Owens. The single spent a single week at number one and a total of thirteen weeks on the country chart. The song is still performed at the Country Bear Jamboree attraction at certain Disney parks.

paragraph_text: Dregs of the Earth is an album by Dixie Dregs. It received a Grammy nomination for Best Rock Instrumental Performance.

paragraph_text: Throughout 2011 -- 16, Minaj has been nominated for a total of 10 Grammy Awards. She received her first Grammy nomination in 2011 in the category Best Rap Performance by a Duo or Group for the single ``My Chick Bad ''with fellow rapper Ludacris at the 53rd ceremony. For the 54th Grammy Awards in 2012, Minaj received nominations for Best New Artist and Best Rap Album for her debut album Pink Friday, and Best Rap Performance for her single`` Moment 4 Life'' featuring Drake. In 2015, Minaj received two nominations at the 57th Grammy Awards for Best Rap Song for her single ``Anaconda ''and Best Pop Duo / Group Performance for her joint single`` Bang Bang'', with Jessie J and Ariana Grande. For the 58th Grammy Awards in 2016, Minaj received three nominations, including Best Rap Album for her third studio album The Pinkprint.

paragraph_text: "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.

paragraph_text: "Put On" is a song written and performed by American rapper Young Jeezy and hip hop recording artist Kanye West, taken from the former's third studio album, "The Recession". The song was released as the album's lead single on June 3, 2008. The song received a Grammy nomination for Best Rap Performance by a Duo or Group.

paragraph_text: ``Crazy Rap '', also known as`` Colt 45 and 2 Zig Zags'' or simply ``Colt 45 '', is a dirty rap single recorded by rapper Afroman. It was featured on his third album, Sell Your Dope, and was later included on his greatest hits album, The Good Times. It is often referred to as`` Colt 45'', as the hook states ``Colt 45 and two zig - zags, baby that's all we need ''. The song failed to replicate the success of its predecessor but it nonetheless still charted across Europe, reaching the top 10 in the UK.

Question: Who sings the rap in Baby by the performer of Down to Earth?
Answer: Ludacris