Watch Britney Spears and Jimmy Fallon Play Preteen Bffs in "Ew!"

Last night, Britney Spears joined Jimmy Fallon on the Tonight Show and appeared in Fallon's ridiculous, recurring sketch, "Ew!"

"Ew!" is a bit where Fallon, poorly dressed in teenage drag, acts like the ultimate valley girl with a very special guest.

Well this time around, Fallon aka Sara, reunited with her BFF from summer camp to have their first-ever home sleepover.

The show's host and the pop icon played "Fashion Freeze" in which they strike model poses, shared their "Throwback Thursday" pics on Instagram, and included a speed round of "ew" during which Britney was asked to share her thoughts on various items and people including matcha ice cream, pop-up phone holders, Steve Carell, and Las Vegas.