Regardless, the two actresses (plus peer Brie Larson) dressed up like dudes for pal Jenny Lewis' "Just One of the Guys" music video. The song serves as the first track from The Voyager, the indie singer-songwriter's first solo album in six years. Lewis calls the compilation "the hardest one" she's ever made.
What was it like shooting the music video? "We screamed with laughter all day, huddled behind the monitor," Lewis tells GQ. "I haven't laughed that hard since What About Bob? came out on laser disk."
The actress' transformations are purposefully ridiculous.
Stewart looks like a mustachioed Justin Bieber, while Hathaway rocks a rat-tail. "The rat-tail was all Annie," Lewis says, praising the Oscar-winning Les Misérables actress for her wardrobe addition. "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 mother--ker."