Jessica Biel Dressed up as Justin Timberlake in 'NSYNC for Halloween

I think Jessica Biel and her husband Justin Timberlake just totally won Halloween. Not only did Jessica dress up as Justin from his 'NSYNC days - curly hair, space suit, and all - but he dressed up as a big giant microphone!

They were at the star-studded Casamigos Halloween Party in Beverly Hills hosted by Rande Gerber and Cindy Crawford. Paris Hilton, Lisa Rinna, Kaitlynn Carter, and four friends who dressed as the other members of 'NSYNC.