Kelly Osbourne is suing her former landlord, and it's not just for a lot of money. She's also defending her honor that she's not a filthy slob.
In the lawsuit, obtained by TMZ ... Kelly says she rented a fancy apartment in West Hollywood, which has been home to many a celeb, including Lindsay Lohan, Adam Lambert and Brody Jenner.
Kelly plunked down $18,700 as a security deposit before moving in. When she moved out, she claims the landlord never bothered to stop by to check out the unit, but shortly thereafter Kelly got bad news -- the landlord sent her an email notifying her of an estimate of damages. According to the landlord, the damage and cleaning expenses ate up her entire deposit so Kelly was informed she'd be getting zilch.
Kelly is suing for her deposit back, and under California law if the landlord wrongly retained the deposit she gets up to twice the amount. She also apparently thinks the landlord is an a-hole, because she wants punitive damages to teach the landlord a lesson.