Kristen Stewart and Anne Hathaway are bending genders and rocking some pretty sweet mustaches in Jenny Lewis' 'Just One of the Guys' music video.

The actresses, along with Brie Larson and Tennessee Thomas, make up Lewis' band, and all five ladies take their turns dressing up as dudes, donning LOL-worthy fake mustaches, tracksuits and even a rat tail (we're looking at you, Anne Hathaway).

"The rat tail was all Annie," Lewis revealed to GQ about the Academy Award-winning actress' hysterical style. "Deep character exploration. Her dude is a bit more Backstreet Boy than the rest. Melancholy Backstreet Boy is what I think she was going for — he really feels things deeply and break dances like a motherf-----."

Indeed he does, and Stewart's character also busts a few smooth moves of his own.

"We screamed with laughter all day, huddled behind the monitor," Lewis told GQ about the making of the video. And it's not hard to see why! Watch the hilarious video above.

PopCrushers, what do you think of Kristen Stewart and Anne Hathaway's mustachioed male personas?

More From 99.9 The Point