Watch Rolling Stones Play 'Champagne and Reefer' With Buddy Guy

The Rolling Stones brought out a special guest Tuesday night at Milwaukee’s Marcus Ampitheater for their only amphitheater date of their North American Zip Code. Seven songs into their Summerfest set, opening act Buddy Guy came onstage to join the band on “Champagne and Reefer.” They first played the Muddy Waters cover with…