Macklemore and Ryan Lewis

Seattle rapper Macklemore and producer Ryan Lewis hit a string of relatively intimate venues—when you consider the festival crowds they've been rocking lately—as part of the American Express Concert Series. Tickets are available only to AmEx cardholders, so if you want to catch the live performance of "Thrift Shop," you should sign up—which is appropriate, since that's where you'll be shopping when you're up to your ears in credit card debt.