Black Keys Singer Dan Auerbach -- I Lost Bob Dylan's Hair ... Oh, and My Wife Too

Black Keys' singer Dan Auerbach is losing more than love or money in his divorce -- in fact, rock historians would say he's parting with something far more valuable ... Bob Dylan's hair!!!

Guess, you'd call that a split end to Dan's marriage -- if you're into bad puns (like someone in the TMZ newsroom is).