Pop superstar Christina Aguilera recently belted out Aretha Franklin's "Think" and Kelly Clarkson's "Stronger" on the platform of a New York City subway station.
Wearing disguises, Aguilera and The Tonight Show host Jimmy Fallon drew a big crowd as they busked.
Of course, it was pretty obvious who was singing because of Aguilera's distinctive voice and hand motions on the microphone (not to mention she and Fallon were flanked by bodyguards) but several people who stopped to watch the show still acted surprised when the pair pulled their disguises off.
Fallon has previously busked on the subway with acts like Miley Cyrus, U2 and Maroon 5 for The Tonight Show.
Watch the performance below: