Photo by Kevin Winter, Getty ImagesHeather Graham and Bradley Cooper at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Kevin Winter, Getty ImagesZac Efron at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Michael Tran, Film MagicJustin Bartha at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesAshley Olsen at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Michael Tran, Film MagicKristen Bell at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Michael Tran, Film MagicEva Mendes at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageEd Helms at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageJim Carrey at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageHeather Graham at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesJason Bateman and Amanda Anka at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Kevin Winter, Getty ImagesJustin Bartha and Ed Helms at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Michael Tran, Film MagicEva Mendes at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageBradley Cooper at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Kevin Winter, Getty ImagesHeather Graham at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesKen Jeong at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jordan Strauss, WireImageJamie-Lynn Sigler and Jerry Ferrera at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesMary-Kate Olsen at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesJeremy Piven at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesKate Walsh at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Kevin Winter, Getty ImagesBradley Cooper at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jordan Strauss, WireImageAshley Olsen at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jordan Strauss, WireImageDanny Masterson at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd Williamson, WireImageJason Bateman at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesKristen Bell at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesEd Helms at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageBriana Evigan at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Kevin Winter, Getty ImagesJamie-Lynn Sigler at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageCheryl Hines at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Michael Tran, Film MagicJim Carrey and Jenny McCarthy at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd Williamson, WireImageShoshana Bush at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jeffrey Mayer, WireImageKate Walsh at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jordan Strauss, WireImageKendra Wilkinson at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesSasha Barrese at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd Williamson, WireImageHeather Graham, Brett Ratner and Rachael Harris at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd Williamson, WireImageVail Bloom at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jordan Strauss, WireImageAngela Kinsey at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesBriana Evigan at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Jason Merritt, Getty ImagesAudrina Patridge at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd Williamson, WireImageHeather Graham and Eva Mendes at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd Williamson, WireImageJustin Bartha, Bradley Cooper, Ed Helms and Heather Graham at the Los Angeles premiere of The Hangover - 06/02/2009

Photo by Todd WIlliamson, WireImageBen Hollingsworth, Sara Paxton and Nico Tortorella at the Los Angeles premiere of The Hangover - 06/02/2009