Which came first, the chicken or the egg? And by that, we mean, which came first: Kristen Stewart getting the role of angsty rocker Joan Jett in The Runaways, or Stewart dressing and pouting like an angsty rocker at awards shows? Whether the role made the woman or the woman made the role, it would require some research to answer, but you can't deny that Stewart plays the part of the misfit Jett well, and is part of a decent cast that inhabits this simple, familiar, drug-addled tale of a rock-and-roll rise and fall. You can probably guess at everything that will happen, even if you don't know the story of the Runaways (an all-girl punk group that included Jett and Lita Ford), because it seems like a well-worn path for successful bands: struggle, success, drugs, breakup. But as long as you don't need a particularly engaging story, this long music video is beautifully shot and the characters all look sufficiently bad-ass for the movie's sole purpose: to chronicle how much the Runaways rocked.