Check out Luke (Freddie Stroma) singing "Knockin" in the all new movie "A Cinderella Story: Once Upon A Song". Catch this song and more on the upcoming A Cinderella Story: Once Upon a Song soundtrack.
A Cinderella Story: Once Upon A Song, starring Lucy Hale (TV's "Pretty Little Liars") and Freddie Stroma (the Harry Potter franchise), comes to DVD and For Download on September 6, 2011 from Warner Home Entertainment Group.