OMG! Halloween is just around the corner. Do you have a cool costume yet? M has tons of fun ideas about how to dress up as a character from Teen Beach Movie or your fave pop star, but if you're still undecided, never fear!
We rounded up some of the best celebrity costumes so that you can draw your inspiration from them. But there's a catch — first you'll have to guess which celeb is wearing each costume!
Click through the gallery to play the celeb costume guessing game! How many did you get right? Tell us your score in the comments!