Kenny Chesney performed a thrilling set at the Decade of Difference concert at the Hollywood Bowl on October 15, starting with his 2010 hit "Somewhere With You." Although the song's lyrics are dark — Chesney says it's a "tortured soul" song -- the vibe is very reminiscent of the Bee Gees of the 1970s. Chesney also fired up a rendition of "Beer in Mexico," which he wrote for another birthday party — that of iconic rocker Sammy Hagar. Finally, Chesney welcomed Grace Potter to the stage for their duet, "You and Tequila." For Chesney, the song was somewhat of a callback to an Eagles song he heard while driving along the Pacific Coast Highway a few years ago. Even though he and Potter have completely different backgrounds — Chesney is from Tennessee and Potter is from Vermont — the harmony is stirring.