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Christina Aguilera Sang in Disguise, but There's No Hiding That Voice

Xtina and Jimmy Fallon went undercover in the NYC subway

Liam Mathews

On Thursday's Tonight Show, Jimmy Fallon and Christina Aguilera went down to the Rockefeller Center subway station to busk in disguise. Aguilera -- whose new album, Liberation, is out today -- wore a big floppy hat that hid her face, but her voice is unmistakable. It fills the whole station. Fallon played the banjo while wearing a weird hat and a fake goatee. It was a Johnny Depp-esque look.

They performed Aretha Franklin's "Think" as a crowd gathered to marvel at this mystery woman's powerful pipes. Then they removed their disguises and performed Aguilera's own "Fighter."

Every time Fallon does this -- he's done it with Miley Cyrus, too (precisely one year earlier, oddly enough) -- I think "I hope they're doing this in the middle of the day. If they got in the way of my commute, I'd knock that goofy hat off Fallon's head."

The Tonight Show airs weeknights at 11:35/10:35c