Kevin Ostajewski Paris Hilton and Nicky Hilton are toasting their mom in style! To celebrate Kathy Hilton's 65th birthday, the sisters threw a star-studded party on Friday in Los Angeles.

Paris Hilton knows how to get a party jumping 'cause she brought the stars out in full force for her birthday. The famous entrepreneur hosted a huge star-studded bash for her 44th birthday on ...