"Hello Twelve, Hello Thirteen, Hello Love," "Sing!," and "The Music and the Mirror" were deleted (the first was touched on briefly) and new songs "Surprise, Surprise" and "Let Me Dance For You" were added.The show's breakout tune, "What I Did for Love," was originally performed by Diana as a paean to dancers and their dedication to their craft, but in the film it becomes a wistful love song by Cassie about Zach as she leaves the stage.