Paris Hilton
Paris insists that she hates confrontation, but if there is a feud in Hollywood she is usually in the centre of it. Known for her refusal to pose for photos with other women, she has reportedly called Jessica Simpson "fat", Hillary Swank "ugly", Sharleen Spiteri an "ugly idiot" and apparently sent Nicole Ritchie a biscuit through the post to taunt her about her weight problems.
It may be the case that Paris really has nothing better to do then obsess over image.