"I was really concerned about getting the music right because The Runaways have a very distinctive sound. It's not just singing, it's trying to sound like them. I wasn't lip-synching. I worked hard to get like that growl that Joan does when she's performing. I'm not saying that I did it perfectly, but I gave it my best. And I learned to play the guitar because I didn't want to fake it."
Kristen answered more questions here.