If you needed any more indicators of his huge ego...

I don't even know what to call him, he's changed his name so many times. But he's suing because they recorded a tribute album for his birthday.

Fifty artists who recorded Prince covers in honor of His Purpleness' 50th birthday June 7 have been slapped with a lawsuit by the short-tempered star. His lawyers now demand that all copies of the tribute be destroyed.