This is hilarious!

Britney Spears and Jimmy Fallon pretended they were teenage girls back from summer camp in this "Ew!" sketch, and we're impressed with the pop princess' acting chops!

They joke about poison ivy, selfies, and take a moment to rate Steve Carrell's hotness. At one point, Brit Brit even busted out in song with her hit "Not A Girl, Not Yet A Woman."

Watch the full video!