Watch Christina Aguilera Crush a Britney Spears Impression on 'Tonight Show'

Douglas Gorenstein/NBC
Christina Aguilera and host Jimmy Fallon play Wheels of Impressions on The Tonight Show Starring Jimmy Fallon on Feb. 23, 2015.

The friendship-turned-rivalry-turned-Twiter-respect between Christina Aguilera and Britney Spears is well documented. So it really shouldn't surprise anyone that Aguilera has a killer impression of Ms. Spears locked and loaded at all times. 

But still. On the Tonight Show Monday night (Feb. 23), Aguilera delighted the crowd with her singing impression during a round of "Wheel of Musical Impressions." If you've ever wondered what Spears sounds like singing "This Little Piggy," well, Jimmy Fallon and Co. are here to help you out. (Side note: Fallon asking Aguilera "You know Britney, right?" is the silliest thing he's ever said.)

Three More Christina Aguilera Impressions That Will Kill You

Aguilera should maybe break out impressions on The Voice? Her Shakira and Cher are also spin-in-the-big-red-chair worthy.