By Meghan Blalock
Updated Oct 30, 2012 @ 2:03 pm
Halloween Costumes
Credit:; Coqueran/FAMEFLYNET

Celebrities love to play dress up for Halloween! Christina Aguilera played queen to her knight, boyfriend Matthew Rutler, as they headed out on the town for the spooky holiday, while Ryan Seacrest and girlfriend Julianne Hough stepped out as infamous law-breaking duo Bonnie and Clyde. Click through the gallery to see more star Halloween costumes!