My sister watched this film a few years ago and she loved it. Since it's her birthday soon I want to get her it. Basically it's about this boy at high school and he's obsessed with David Bowie. He gets a job in a restaurant and meets this guy who he likes and his best friend she fancies him. He makes music and starts going to gay bars and starts looking like David Bowie. That's all I really know?
I agree with the first responder. It's probably "Bandslam" (2009) after I did a web search. But...since he or she got a thumb's down, now I'm not so sure. It's available to buy on Amazon.com, BTW, here:
Bandslam