Todd Phillips’ The Hangover turned out to be the surprise hit of 2009. Phillips has been hard at work on the follow up and this looks like it’ll be an equally uproarious adventure with The Wolfpack coming back for round II. This time the trio (yup again missing Justin Bartha from the looks of it) is in Thailand. Alan’s shaved head, Stu’s Tyson tattoo, an equally disheveled Phil and now a monkey?? Yup, this looks like another blast they’ll never ever remember. Have a look at the trailer below… The Hangover Part II is directed by Todd Phillips (Due Date) and brings the original cast back for all the insanity. Along…