Movie stars and rock stars don't always co-mingle, but they last week. Musicians from all genres performed classic movie tunes. Some of the numbers include Beyoncé singing "Somewhere Over the Rainbow," Mary J. Blige and John Legend singing "As Time Goes By" from the movie "Casablanca," Carrie Underwood singing "The Sound of Music" and Usher singing "Singin' in the Rain." Tony Bennett and Elton John will be there, too.

You can see all three of Carrie's look: The red carpet, presenting and performing.
SLIDESHOW: Carrie @ Movies That Rock

Miss the show? VIDEO: Carrie Sings The Sound of Music