" 'Toxic'!" Gabe Saporta and Victoria Asher of Cobra Starship shouted in unison.
"I don't know if it's that the song was so amazing or what," Gabe said. " 'Womanizer' is amazing!" he added about director Joseph Khan's follow-up video, which features a similar series of Britney alter egos as a theme.
"I'm going to go with the 'Slave' joint," Nick Cannon said with certainty. "That track was crazy. It was probably my favorite Britney record but then the video ... It was all hot and they were sweating. Britney did that!"
"Is it '... Baby One More Time' when she was in the schoolgirl outfit?" "Jersey Shore" star Ronnie asked. "Yeah, that's it."
When asked what he liked most about it, he laughed and said, "Her in the schoolgirl outfit!"
"The one when she's in the little schoolgirl clothes," agreed Joe Manganiello, who plays the big and burly werewolf Alcide Herveaux in HBO's "True Blood." "That's a good one."
Emily VanCamp from ABC's "Revenge" agreed with Ronnie and Joe. "That was the thing, you know?"
Comedian and talk-show host Jimmy Fallon also went with "... Baby One More Time," saying, "That one's just a classic!"
Unfortunately, "... Baby One More Time" fell out of the competition in the second round of voting to the newer video "Criminal," off of Spears' latest album, Femme Fatale.
Go vote for the finalists now at Britney30.mtv.com and let us know your thoughts on the tournament in the comments section below!