I've always wanted to be Christina Aguilera's friend. After spending every waking childhood hour singing along to "Stripped" on my walkman, she was top of my imaginary celebrity dinner party list. And now that she's checked off being able to sing like an angel and sell doughnuts at the same time, she's head of the damn table.
For the first edition of "Undercover Sing," Jimmy Kimmel Live recruited Christina to sing into the speaker for unsuspecting customers at Randy's Donuts. Each lucky customer got a version of an Aguilera classic, like "Genie in a Bottle" or "Lady Marmalade," with customized lyrics just for them. Watch the full video to see the moment customers realize it's actually Christina singing to them. Don't pretend your reaction would be any less dramatic.