15 Celebs Spreading Holiday Cheer One Ugly Christmas Sweater At A Time! (via Seventeen Magazine)

This amazing 4-person ugly Christmas sweater Olly Murs posted on Twitter, with Niall Horan, Demi Lovato and Sam Smith all snuggled up in it is ah-MAZ-ing!

Which of the 12 photos in this photo gallery of celebs in holiday sweaters is your favorite?