Idina Menzel Performs a Number From Broadway's If/Then on The Late Show With David Letterman

Idina Menzel, Tony-nominated star of the latest Tom Kitt and Brian Yorkey musical, If/Then, made an appearance on last night's Late Show With David Letterman to perform one of the show's poignant ballads, "You Learn to Live Without." If the live performance was past your bedtime, here's another chance to hear Menzel show off why she is among this year's Tony contenders.