MusicAlex RawlsOctober 29, 201460 Minutes, Anderson Cooper, Dave Grohl, David Letterman, Foo Fighters, HBO, Late Show, Letterman, Sonic Highways, Sound City, VoodooComment Voodoo: Foo Fighters' Dave Grohl is (Not) Average MusicAlex RawlsOctober 29, 201460 Minutes, Anderson Cooper, Dave Grohl, David Letterman, Foo Fighters, HBO, Late Show, Letterman, Sonic Highways, Sound City, VoodooComment