"OMG" is a song by American singer Usher featuring American rapper will.i.am, who also wrote and produced the song. It uses the auto-tune effect in several lines, as well as Jock Jams-esque sports arena chanting. It was released as the fourth single off his sixth studio album, Raymond v. Raymond on March 22, 2010, four days before the album was released. The song was met with a mixed reception from critics, who criticized the use of auto-tune, but commended the song's dance and club vibe. The song marks the second time that Usher has collaborated with will.i.am, following the single "What's Your Name", from his previous album Here I Stand (2008).

"Lil Freak" is a song by American recording artist Usher, taken from his sixth studio album, Raymond v. Raymond. Featuring guest vocals by Trinidadian recording artist Nicki Minaj, the song was written by her, Usher, Ester Dean, Blac Elvis and Polow da Don, the latter two producing the track. Its hook is based on a manipulated sample of American soul musician Stevie Wonder's 1973 hit, "Living for the City". "Lil Freak" was released as the second single from the album in the United States and Canada on March 2, 2010.