"Woohoo" is a song by American recording artist Christina Aguilera, featuring African American rapper Nicki Minaj. The song was written by Aguilera, Onika Maraj, Claude Kelly, Ester Dean and Jamal "Polow da Don" Jones, and produced by Polow da Don, for Aguilera's sixth studio album, Bionic (2010). "Woohoo" was serviced to rhythmic contemporary crossover airplay as the album's second radio single on May 25, 2010. The song, which contains a sample of the 1972 song "Add már uram az esőt" by Kati Kovács, lyrically speaks about the act of oral sex.
"Woohoo" has been described as an electro-R&B and dancehall track. The song received mixed to positive reviews from critics, some of whom praised Minaj's appearance and Aguilera's vocals. Many noted its similarities to Kelis's "Milkshake". However, others expressed distaste for the song's sexual nature. "Woohoo" debuted and peaked at 46 and 79 in Canada and the United States, respectively. Aguilera performed the song in a medley with "Bionic" and "Not Myself Tonight" at the 2010 MTV Movie Awards.