Kristin Cavallari and Stephanie Pratt must not be spending any of their extremely hard-earned Hills dough on the fine cuisine that Los Angeles has to offer.Both ladies attended KISS FM Jingle Ball in L.A. on Saturday night, dressed head to toe in black, and showing off physiques so rail-thin we had to ask, WTF is going on? Pratt has offered the "I'm just so stressed out" line as the reason for her weight loss, while we imagine Cavallari is just disintegrating.
Credit: Celebuzz
