Monster of Rock: Dave Grohl

DAVE GROHL IS TIRED. Pulling a back-crunching, jaw-cranking comedy stretch, he twists, grits his immaculate white teeth and let's out a little squeak. Finished, he sits bolt upright on the sofa, fakes an ear-to-ear grin and tries to look sunny and wide-awake. But it's not working. It's clear that the Nirvana drummer turned singer, guitarist and Foo Fighters frontman, dubbed "the nicest man in rock" by all who meet him, is currently also the sleepiest.