Every Halloween is a chance to come up with an amazing costume idea, but there is always that one costume that stands out in your mind. You know, the one you nailed. The one that everybody loved and that you thought was totally awesome. Maybe you were a Power Ranger when you were a kid or last year you totally rocked an awesome Katy Perry wig and candy-covered outfit. Whatever it is, everyone has their favorite costume that they've worn throughout the years.
M recently caught up with celebs like Bridgit Mendler, Olivia Holt, and Austin Mahone and they divulged their favorite Halloween costumes.
Click through the gallery to find out celebs' favorite costumes. What's the best costume you ever wore? Tell us in the comments!