Britney Spears on "The X Factor" on December 12, 2012 Credit: FOX via Getty

Britney Spears certainly wasn't shy about showing off her fabulous figure on The X Factor Dec. 12.

Rocking a skintight, neon yellow Herve Leger bandage dress and matching platform plumps, the "Scream and Shout" singer wore her blonde hair down and added a smokey eye.

During the show, Spears cheered on her final contestant, Carly Rose Sonenclar, who performed covers of Elton John's "Your Song" and John Lennon's "Imagine." While judges L.A. Reid, Demi Lovato and Simon Cowell were divided on the 13-year-old's performances, they all agreed she deserves a spot in next week's finals.

"Thank you so much for helping me put on some of my favorite performances tonight," Sonenclar wrote in a tweeted directed at Spears, 31. "You are the best and I love you!"

Spears pleaded with her 22 million Twitter fans to vote for the teen phenom. "Tonight was Carly Rose's night," she wrote. "Help me get my superstar into the finals."

To find out Sonenclar's fate -- and to see what Spears wears next! -- tune in for The X Factor Thursday, Dec. 13, at 8 p.m. EST on FOX.