Forgetting Sarah Marshall (2008)

When his girlfriend of 5 years leave him, Peter heads to Hawaii for a break however is shocked to find his ex is vacationing at the same hotel with her new rockstar boyfriend. From the producers of "The 40-Year-Old Virgin" and "Knocked Up" comes a comic look at one guy's quest to grow up and get over the heartbreak of being dumped - if only he can start forgetting Sarah Marshall.

Official website: http://www.forgettingsarahmarshall.com/