If you were confused when The Vamps recently walked out on stage in overalls, pink headbands, and wide-brimmed hats, you were not alone. Their outfits might make a bit more sense when we tell you that the boys challenged their crew members, lost, and had to let the crew dress them for the show! Ohhhh, so that explains it...
But guess what? The Vamps aren't the only hot celeb guys who've been caught in some weird dress-up situations. M found pics of guys like Ross Lynch, Harry Styles, and Niall Horan all playing dress-up!
Click through the gallery to see 15 hilarious times your favorite celeb guys were caught dressing up! Tell us in the comments: Which guy's outfit is the craziest?