question: the song "Feel This Moment" by rapper Pitbull takes it's main melody from a song remixed by who ?
answer: John Ratcliff
context: Title: I Like How It Feels
  Passage: "I Like How It Feels" is a song by Spanish recording artist Enrique Iglesias.  The song was originally intended to be the lead single from a reissue of Iglesias' album "Euphoria", however, the release was cancelled.  The song was later included on the international deluxe edition of his tenth studio album and second bilingual album "Sex and Love".  The song also features guest appearance from American rapper Pitbull and producers The WAV.s.  It is produced by Enrique's longtime collaborator RedOne.  It is the third collaboration between Enrique and Pitbull following "I Like It" and Pitbull's song "Come 'n' Go" off his latest album, Planet Pit.  The song was released as a digital download in Australia and some European countries on 23 September 2011.  The song was released as a digital download in the United States on 4 October 2011.
  Title: Take On Me
  Passage: "Take On Me" is a song by Norwegian synthpop band A-ha.  The self-composed original version was produced by Tony Mansfield, and remixed by John Ratcliff.  The second version was produced by Alan Tarney for the group's debut studio album "Hunting High and Low" (1985).  The song combines synthpop with a varied instrumentation that includes acoustic guitars, keyboards and drums.
  Title: Time of Our Lives (Pitbull and Ne-Yo song)
  Passage: "Time of Our Lives" is a song recorded by American rapper Pitbull and American R&B singer Ne-Yo for the former's eighth studio album "Globalization".  It also appears on Ne-Yo's album, "Non-Fiction".  It was released on November 17, 2014 as the third single from the album by RCA Records.  It was produced by Dr. Luke, Cirkut, Michael "Freakin" Everett and Lifted.  The song marks the second coming for Pitbull by Ne-Yo, following the smash-hit "Give Me Everything" (2011); co-producers Dr. Luke and Cirkut also mark their fourth joint production for Pitbull (after "Timber", "Wild Wild Love", and "We Are One (Ole Ola)") and third for Ne-Yo (after "She Knows" and T-Pain's "Turn All the Lights On").  It became Pitbull's most successful single from "Globalization", reaching number 9 on the "Billboard" Hot 100.  "Time of Our Lives" also went to number one on the US Rhythmic chart.
  Title: Feel This Moment
  Passage: "Feel This Moment" is a song by the American rapper Pitbull, the recording of which features the American singer Christina Aguilera.  It is taken from Pitbull's seventh studio album, "Global Warming," which he released in 2012.  The song was released on February 22, 2013 as the fourth single from the album by Mr. 305, Polo Grounds Music and RCA Records.  It is a dance-pop number that talks about stopping to take a moment to appreciate life.  "Feel This Moment" was written by Nasri Atweh, Chantal Kreviazuk, Adam Messinger, Sir Nolan, DJ Buddha, Pitbull, and Aguilera, while production was handled by Adam Messinger, Sir Nolan, Nasri Atweh, and DJ Buddha.  The song takes the main melody from "Take On Me" by A-ha, which, in turn, was written and composed by Morten Harket, Paul Waaktaar-Savoy, and Magne Furuholmen.
  Title: Vida 23
  Passage: "Vida 23" is a song from American rapper Pitbull's fifth studio album, "Armando".  The song was written by Clinton Sparks, William Grigahcine, Armando Pérez, and it was produced by Clinton Sparks and DJ Snake.It Song perform On Latin Grammy Awards of 2011 by Pitbull.  The song was solely created for Pitbull's campaign with Dr. Pepper.
  Title: Vocal harmony
  Passage: Vocal harmony is a style of vocal music in which a consonant note or notes are simultaneously sung as a main melody in a predominantly homophonic texture.  Vocal harmonies are used in many subgenres of European art music, including Classical choral music and opera and in the popular styles from many Western cultures ranging from folk songs and musical theater pieces to rock ballads.  In the simplest style of vocal harmony, the main vocal melody is supported by a single backup vocal line, either at a pitch which is above or below the main vocal line, often in thirds or sixths which fit in with the chord progression used in the song.  In more complex vocal harmony arrangements, different backup singers may sing two or even three other notes at the same time as each of the main melody notes, mostly with consonant, pleasing-sounding thirds, sixths, and fifths (although dissonant notes may be used as short passing notes).
  Title: Wild Wild Love
  Passage: "Wild Wild Love" is a song by American rapper Pitbull featuring American recording artist group G.R.L. The song was released February 25, 2014 and serves as the lead single off of Pitbull's eighth studio album Globalization.  It was written by Pitbull, Ammar Malik, Dr. Luke, Max Martin, Alexander Castillo Vasquez, Michael Everett (co-composer) and Henry Walter with the production handled by the latter five.  Coincidentally, G.R.L. member Natasha Slayton is the daughter of world renowned comedian Bobby Slayton, known as the "Pitbull of Comedy".
citations: Feel This Moment Take On Me