Hilary Duff & Haylie Duff - Our Lips Are Sealed

American pop music singer Hilary Duff covered "Our Lips Are Sealed" for the soundtrack to the 2004 film A Cinderella Story, in which she stars (see A Cinderella Story: Original Soundtrack). The cover, recorded as a duet with Duff's sister Haylie and produced by John Shanks, was released as a single in the United States in June 2004 (see 2004 in music). The Duff sisters said in an interview that they had wanted to record together, and Hilary chose "Our Lips Are Sealed" because the "secretive" theme of the song relates to the film A Cinderella Story.

Hilary Duff & Haylie Duff - Our Lips Are Sealed