June 13, 2015 12:45 AM

Lena Dunham busted out some moves that would make her friend Taylor Swift proud when she took on Jimmy Fallon in a lip sync battle on Friday’s Tonight Show.

The Girls star clearly came to win – she even wore a sporty Nike outfit. “I wanted to take this seriously and I needed room to flex,” she explained.

“I am facing a worthy opponent,” Fallon admitted.

He kicked off the competition singing the 1982 camp classic “I’ve Never Been to Me” by Charlene.

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Next Dunham took on Calvin Harris’ “Outside.” And that’s when she busted out the floor-writhing choreography.

Fallon came back with Run-DMC’s “Run’s House,” but Dunham easily won the battle with her next song – Queen’s “Fat Bottomed Girls.”

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