Simple by KATY PERRY Overview Tag Appears on (A) Katy Perry Katy Perry One of the Boys Sisterhood of the Traveling Pants Soundtrack The Sisterhood of the Traveling Pants The Sisterhood of the Traveling Pants (Music from the Motion Picture) The Sisterhood Of The Traveling Pants - Music From The Motion Picture The Sisterhood of the Traveling Pants [Original Soundtrack] Unreleased Playcount 3 Listeners 2