Check out how your favorite Gossip Girl stars have transformed!
Taylor Momsen: Then
Before landing a part in How The Grinch Stole Christmas, the St. Louis native (here in 2001) appeared in a Shake N Bake commercial. "I was wearing a little yellow shirt and I ad-libbed, 'You shake it up up 'til it's crunchy and ready to eat!'" Momsen once said.