When K-Cav first confirmed she was joining The Hills (back in May), Stephanie Pratt was more than a little bit intimidated terrified. But despite her initial apprehension ("I think we're all a little scared," Steph quipped), the two casties were spotted hitting the beach last week. And they actually look as though they're (gasp) having fun! Check out these pix of the Hills gals soaking up the sun in Malibu, and try and ignore that conspiratorial look on both their faces. It's not like K-Cav's plotting anything with Spencer Pratt's baby sis ... right?