The three main guys in The Hangover 3 get most of the attention, but what about good ol' Justin Bartha? Justin, who plays Doug in all the movies, is the heart and soul of the plot, and if it wasn't for him, none of the wolfpack's shenanigans would've ever even happened. So we gotta give the guy a bit more credit! Because also, next to Bradley Cooper, Justin is definitely the best-looking of the bunch. Just throwing that out there.