He's done it with U2, and Maroon 5, and even Miley Cyrus – and now it's Alanis Morissette's turn.
In the clip above, Jimmy Fallon and the legendary singer-songwriter take to the NYC subway disguised in wigs and dark sunglasses. They start off with a performance of "The Little Drummer Boy", then when a suitable crowd has gathered the disguises get whipped off for a rousing rendition of Morissette's classic "You Oughta Know."
What a lovely way to start the day.
