Jennifer Lopez Flips Jimmy Fallon the Bird Before Channeling Backpack Kid in “Fast Dance-Off”

If you didn’t think backpack kid’s dance move could look sexy, allow Jennifer Lopez to convince you otherwise. She and Jimmy Fallon took turns dancing very fast to “the least danceable” slow songs of the ’70s for a segment on the The Tonight Show. Of course, the super-competitive singer had to get the rules spot on, to give her the best chance at winning. But as the duo started things off with what looks like an inside joke, J Lo hilariously ended up flipping Jimmy the bird.

Though she might have been apprehensive at first, the 48-year-old star looked incredible wearing a red sequined David Koma dress on the dance floor, pulling off the moves in style. After both put on a pretty awesome show, they finished with an epic “backpack kid” interpretation dance to “Reunited,” by Peaches and Herb. While J Lo nailed the move, Jimmy may have a little more practice to do before he becomes a master of the art. Watch the full video above.