Bruce Springsteen on Instagram: "50 years ago tonight in Ann Arbor, Michigan, Bruce counted off the “Detroit Medley” for the first time — a high-octane tribute to Mitch Ryder and the Detroit Wheels, Little Richard, and Chuck Willis. A party piece with staying power that also happened to debut on his birthday, it became a fixture of E Street Band shows over the next half-century. Happy Birthday, Bruce!"