Jimmy Fallon has created a monster with his Lip Sync Battles, and Lena Dunham's appearance on Friday was another awesome example of how great it can be.

The star and creator of HBO's series 'Girls' showed up in sporty costume prepared to battle. She patiently waited while Jimmy Fallon went first, and then rolled into 'Outside' from Calvin Harris and Ellie Gouldling complete with floor dancing.

Jimmy's Charlene and Run DMC were both quality performances, but Lena stole the show with Queen. Her lip-syncing was OK, but her song choice and interpretations were on point.