Claude GassianRock legends met a blues legend onstage Tuesday night when The Rolling Stones jammed with Buddy Guy at Milwaukee’s Marcus Amphitheater.

Guy, who opened for the band, came onstage seven songs into the set for a cover of Muddy Waters’ “Champagne and Reefer,” reports Rolling Stone.

Jagger added some bluesy harmonica for the break in the song as Guy traded licks with guitarist Keith Richards.

The last time Guy performed the song live with The Stones was in 2006 at New York City’s Beacon Theatre. John Mayer and Eric Clapton have guested on the song with the Stones in concert.

The audience was also treated to “Doo Doo Doo Doo Doo (Heartbreaker),” which the Stones played for the first time since 2007. Fans picked the song via online voting.

The Milwaukee show was the lone amphitheater date of the band’s North American Zip Code tour. The trek resumes June 27 at Arrowhead Stadium in Kansas City, Missouri. No word on touring plans after that, but Mick Jagger told Rolling Stone he hasn’t ruled out the possibility of South American dates.

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