Forgetting Sarah Marshall

I watched the DVD "Forgetting Sarah Marshall."

Synopsis

Peter (Jason Segel) is a composer and a likable sad guy who's devastated when his girlfriend of five years, Sarah Marshall, (Kristen Bell) the star of a cheesy CSI-style crime show, dumps him. He weeps, he rails, he mopes. Finally, his step-brother Brian (Bill Hader) suggests Hawaii, so Peter heads for a resort on Oahu where, as he's checking in, he sees Sarah and her new beau, Aldous, (Russell Brand) a polymorphously perverse English rocker. The weeping and moping starts again, until Peter is rescued by Rachel, (Mila Kunis) a thoughtful hotel clerk who invites him to a luau and to hang out. Although he constantly runs into Sarah and Aldous, Peter starts to come alive again. Will Sarah realize what she's lost, and what about Rachel?