1. Billboard Bits: Bieber Director Drops Out, Joe Perry Slams Steven Tyler

    August 04, 2010 7:29 PM EDT Billboard Bits serves up the best bite-sized nuggets of music news and gossip. Bieber Biopic Director Drops Out Davis Guggenheim has reportedly backed out of directing Justin Bieber's upcoming 3D biopic. According to Deadline, the filmmaker -- who is known for directing "An…