Kathleen Hanna has one of America's toughest punk voices – somewhere between a Johnny Rotten sneer and a Valley-girl shrug. She defined her raging sound in the 1990s, from the riot-grrrl attack of Bikini Kill to the punk-disco of Le Tigre. But after lying low in recent years (and battling Lyme disease), she explores what happens to all that anger with age. Run Fast hops into synth-pop aggro and lounge-pop romance, and in "Goodnight Goodbye," asking herself some hardass questions ("What happens when you're not 20 but 41?/And you have to sink into the you you've now become?"), Hanna sounds like her old fearless self.