Did you wake up this morning with a bellyache from all the candy you inhaled last night? Don't worry, M Girls — we're willing to bet some of your fave celebs had a little too much candy too. Stars like Ariana Grande, Debby Ryan, and Demi Lovato got really into Halloween. We wouldn't be surprised if they're clutching their tummies from too many lollipops as we speak!
Though they may have had too many treats, these celebs' costumes were SO awesome. Debby went as Jessie from Toy Story, Demi dressed up as a zombie, and Ariana wore three different costumes throughout the day! But which celeb will win our Halloween costume showdown?
M is launching its 1st Annual Celeb Halloween Costume Contest and you have the power to vote and choose the best celeb costume. Who will YOU declare as the winner of Halloween?
Click through our gallery to see some costume highlights. Make sure to click all the way to the last page — that's where you can vote for the best Halloween costume of 2013!
Debby Ryan as Jessie from Toy Story