Foo Fighters frontman Dave Grohl posted a photo on the band's Facebook page of a white guitar with blood smeared on it, a result of the band's first rehearsal in some time. Grohl wrote in the accompanying caption, “First practice. Been too long. Look out, Mexico . . . xoxo Dave.” Foo Fighters will play its first ever Mexican shows next month, on December 11th and 13th in Mexico City, marking the band's first official live gigs since summer 2012.