"The Voice" judge stopped by "The Tonight Show" on Monday, where she spun the "Wheel of Musical Impressions" with host Jimmy Fallon.
"How it works is we're gonna take turns hitting this button here, which activates the musical impressions generator," the comedian explained. "It will land on one random singer that one of us can do an impression of and then one random song title... Whoever's turn it is has to do an impression of that musician doing that song."
After tackling Cher, the "Beautiful" singer did her best Britney Spears -- which turned out to be really good!
The Grammy winner did an epic impersonation of her former "Mickey Mouse Club" costar, singing "This Little Piggy" to the tune of Spears' big hit "... Baby One More Time."
Fallon gave the "Genie in a Bottle" singer a standing ovation. "Oh, my God! That is something I've always wanted! That is amazing. I loved that so much!" he gushed.
Check out the clip below to see Xtina's amazing impression of Brit, as well as her performance of Shakira singing the "Golden Girls" theme song!
