Jimmy Fallon, Lindsey Lohan

Lindsay Lohan channeled her inner Regina George for a surprise appearance on Late Night with Jimmy Fallon Thursday night.

Jimmy Fallon and LiLo played young tween stars of a fake TeenNick show Ew. "I'm Sara," Fallon said wearing a blonde wig, "and if you're wondering, that's S-A-R-A. No H, because H's are ew!"

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"Sara" then introduced her BFFLRF — best friend forever for life for realsies — Stephanie Sullivan (Lohan). The pair then discussed everything from One Direction, Dustin Hoffman, rakes and, of course, twerking.

"Twerking is so 2-0-1-3," Lohan said. "Nowadays it's all about scrumping!"

Watch the full skit, including Fallon and Lohan's epic "scrump-off," below.