Pick A Song is a romantic-comedy-drama-musical film starring Katie Cassidy, Cory Monteith, Selena Gomez, Demi Lovato, Meghan Martin, Joe Jonas, AnnaSophia Robb, Dianna Agron, Brenda Song, Mark Salling, Chris Colfer, Naya Rivera, Darren Criss, Heather Morris, Bridgit Mendler, Zendaya, Bella Thorne, Adam Hicks, Chris Brochu, Stefanie Scott, Maira Walsh, Justin Bieber, Justin Timberlake, Christy Carlson Romano and Mandy Moore