The stalker, known only as ROY, insisted upon holding all night vigils outside Gahan's house - until the singer head-butted him and broke his nose.
Gahan says, "You'd look out the window at four in the morning and Roy would still be standing there.
"I ended up assaulting him - well I head-butted him and broke his nose. And I actually got sued! He sued me for $500,000 and he ended up getting $40,000. He claimed I gave him brain damage, but he was pretty f**ked up to start with."