1 / 11

1

Kenny Chesney and Grace Potter arrive at the "A Decade of Difference" concert on October 15, 2011, at the Hollywood Bowl, Los Angeles.

(Photo by Kevin Mazur/Getty Images for Control Room)

Grace Potter at Decade of Difference concert

Surprise guest Grace Potter performs with Kenny Chesney at A Decade of Difference: A Concert Celebrating 10 Years of the William J. Clinton Foundation on October 15, 2011, at the Hollywood Bowl, Los Angeles.