'Today Show' Halloween Costumes 2010: Meredith and Al Dress as Lady Gaga and Superman

Remember when Matt, Meredith and the 'Today Show' gang dressed up as the characters from 'Star Wars' for Halloween? This year, Halloween on the Plaza was just as spectacular!

We loved seeing Meredith Viera donned a Lady Gaga costume and showed off her spectacular dance moves while lip-syncing to "Bad Romance." Al Roker, who was filling in for Matt Lauer, sported tights and a cape as Superman, Ann Curry dressed as famed pilot Amelia Earhart, and Natalie Morales played the part of pop star Justin Bieber. Kathie Lee Gifford and Hoda Kotb also got in on the Halloween action, dressing as Lucy and Ethel from "I Love Lucy."

And what would 'The Today Show' without special celebrity guests? Will Ferrell and Tina Fey stopped by wearing costumes from their new animated movie, "Megamind."

We love that the hosts have so much fun! Check out their big reveals in the video!