Via Billboard.com. This is confirmed: Actors Eugene Levy and Catherine O'Hara are confirmed for Sunday's (Feb. 29) 76th Academy Awards ceremony. The duo will perform their nominated song "A Kiss at the End of the Rainbow" from "A Mighty Wind." Michael McKean (who is in the film), wrote the song with his wife, Annette O'Toole. As previously announced, Bruce Gaitsch is in the backing band of the duet for tonight The Oscars ceremony.
Other performers nominated for Best New Song at the 76th Academy Awards ceremony are: Sting, Alison Krauss, Elvis Costello, T Bone Burnett and Annie Lennox.