Forgetting Sarah Marshall (2008)

Peter Bretter, a composer, is known to be the boyfriend of TV star Sarah Marshall, until she decides to end their relationship. After five years of dating, he feels lost and lonely, so he takes a trip to Hawaii to move on with his life. But by coincidence of life, there he meets her and her new boyfriend. A fresh romantic comedy, fun and even touching, with a great cast and a story that reflects on heartbreak in an unexpected way.