Christina Aguilera does epic Britney Spears impersonation on Fallon...

A visit to The Tonight Show Starring Jimmy Fallon saw Christina Aguilera impersonating her 90s pop rival Britney Spears with 'This Little Piggy.' 
This was done last night during a game of 'Wheel Of Musical Impressions.' Christina had Britney's nasally vocals down pat, even the quivering tone too. In fact, it was almost as good as Nicole Scherzinger's impression. Hilarious!