Socialite Paris Hilton has launched a veiled attack on her The Simple Life co-star Nicole Richie by calling skinny celebrities "gross". The daughter of soul star Lionel Richie has worried friends and relatives with her dramatic weight loss after she and former best friend Hilton mysteriously fell out last year (05). And the hotel heiress insists she has no time for those who take their physique to the extreme. She says, "A lot of women are too thin. I think the ones who are getting really skinny look gross."