I don’t shop at Hot Topic because I’m not a teenage girl, but I’ve heard that the stores exist. But I am old enough to remember Joan Jett and the Blackhearts at the height of their fame in the early ’80s. But now two generations are colliding in a mess of tee shirts, push-up bras, and nail polish as the rock star’s record label sues the retailer over the Blackheart brand. [More]