Making the most of a two-month break between Foo Fighters shows, Grohl went into guest-appearance hyperdrive. He joined Joan Jett at the Rock and Roll Hall of Fame induction festivities in Cleveland, strolling onstage to play guitar and sing along on her performance of the Runaways' "Cherry Bomb." Eleven days later, Grohl popped up at the ASCAP Pop Music Awards in Los Angeles, where he presented Gene Simmons and Paul Stanley with the ASCAP Founders Award. In May, Grohl and Foo Fighters guitarist Chris Shiflett surprised the crowd at the Conejo Valley Days Carnival in Thousand Oaks, California, by jumping onstage and storming through a set of classic-rock songs with Chevy Metal, Foos drummer Taylor Hawkins' cover band. Later that month, the Foos donned tuxes for the final episode of The Late Show with David Letterman, delivering an extended rendition of "Everlong" as a career-spanning Letterman montage filled the screen; three nights later at London's O2 Arena, Grohl joined Paul McCartney for an unexpected run-through of the Beatles' "I Saw Her Standing There." Upon his return to London in September, Grohl would host some high-profile guests of his own at the Foo Fighters' National Bowl show, bringing out Queen's Roger Taylor and Led Zeppelin's John Paul Jones for a rousing rendition of Queen and David Bowie's "Under Pressure," in honor of what would have been Freddie Mercury's 69th birthday.