Jessica Alba and her BFF, Kelly Sawyer, as Romy and Michelle.
From Disney princesses to pop culture icons, celebrities did not hold back when it came time to impersonating some of their favorite figures this Halloween.
Jessica Alba, Channing Tatum, and Beyonce all coupled up to don serious couples costumes, while others became almost unrecognizable under their full-on ensembles.
RELATED: 8 of Heidi Klum's Most Outrageous Halloween Costumes
Check out the gallery above to see some of the best celeb Halloween costumes from 2015: