Rehearsing For Oscar

Beyonce rehearses for the 79th Academy Awards at the Kodak Theatre in Los Angeles, Friday, Feb. 23, 2007. Beyonc

Beyonce rehearses "Listen" from "Dreamgirls" for the 79th Academy Awards at the Kodak Theatre Feb. 23, 2007. Also from "Dreamgirls," Jennifer Hudson will sing "Love You I Do" (music by Henry Krieger and lyric by Siedah Garrett), and Keith Robinson, Anika Noni Rose and other castmates will perform "Patience" (music by Henry Krieger and lyric by Willie Reale).

James Taylor rehearses at the Kodak Theatre Friday, Feb. 23, 2007, in Los Angeles. Taylor will join Randy Newman in performing the Oscar-nominated best original song "Our Town" from the animated feature film "Cars" during Sunday's 79th Academy Awards.

James Taylor rehearses at the Kodak Theatre Friday, Feb. 23, 2007, for Sunday's Academy Awards show.

Melissa Etheridge rehearses for the 79th Academy Awards at the Kodak Theatre in Los Angeles, Friday, Feb. 23, 2007. She will perform "I Need to Wake Up" from the documentary feature "An Inconvenient Truth." Etheridge wrote the music and lyric for the nominated song.

Melissa Etheridge gets some set-up help from stagehand Jan Parent during a rehearsal for the 79th Academy Awards at the Kodak Theatre in Los Angeles, Friday, Feb. 23, 2007.

Italian composer Ennio Morricone is seen during rehearsals at the Kodak Theatre in Los Angeles, Friday, Feb. 23, 2007. Morricone will receive an honorary Oscar for his contributions to the art of film music during Sunday's 79th Academy Awards.

Celine Dion rehearses at the Kodak Theatre Friday, Feb. 23, 2007, in Los Angeles for her performance at the 79th Academy Awards being presented on Sunday. Dion will perform during a tribute to Italian composer Ennio Morricone.

Celine Dion jokes during a rehearsal for the Academy Awards at the Kodak Theatre in Los Angeles, Friday, Feb. 23, 2007.

Celine Dion talks with her husband Rene Angelil during a break in her rehearsal at the Kodak Theatre Friday, Feb. 23, 2007, in Los Angeles. Dion will perform during a a tribute to Italian composer Ennio Morricone during Sunday's 79th Academy Awards.

Celine Dion bends to thank the orchestra after her rehearsal for the 79th Academy Awards in Los Angeles Friday, Feb. 23, 2007.