The fastest girl in town, indeed.

Miranda Lambert was in such a hurry to launch her new Certified Platinum Tour that she did it two days early with a last-minute show Tuesday night at Nashville's Exit/In. She announced the free show via Twitter three hours before the doors opened and fans started to line up immediately.

Dressed in glittery, pin-striped tights and black leather short shorts, the singer told her audience that she and her band had been rehearsing for days and "were just ready to play for some people."

"We're going to do our set with some stuff scattered in," she promised. "Thanks for waiting in the cold."