The First ‘Hangover Part 3′ Trailer Has Been Released & Features Zach Galifianakis Singing Like an Angel

We've got a sneak peek at the forthcoming "Hangover Part 3," starring Bradley Cooper, Ed Helms and an angelic-voiced Zach Galifianakis. The movie hits theaters May 24 and also features Ken Jeong (as Mr. Chow), John Goodman and Melissa McCarthy.