The Hangover Part III Teaser Trailer [Video]

The infamous Wolfpack returns for the third and final chapter of 'The Hangover'. 'The Hangover Part III' takes the pack back to Las Vegas and we see some familiar faces and new ones, including Melissa McCarthy and John Goodman! So, sit back, relax, and check out the first trailer for 'The Hangover Part III', which hits theaters this Memorial Day.