"I Gotta Feeling" is a song performed by The Black Eyed Peas. The song is the second single from their fifth studio album The E.N.D. (2009).
When hosting the MTV European Music Awards in 2009, Katy Perry performed a cabaret version of the chorus of the song as part of a medley, along with "When Love Takes Over", "Use Somebody", "Halo", and "Poker Face". Perry also made a cameo appearance in the official music video for the song.