Kristin Cavallari is coming to The Hills. And the 22-year-old is ready to shake things up as the show's new focal point, replacing the retired Lauren Conrad.
In this case, however, she's not feuding with LC, but going toe-to-toe in a fashion clash with Rihanna. The reality TV star wore a Charley 5.0 dress to dinner in W. Hollywood, while RiRi rocked the denim tube dress during a day of shopping in N.Y.C.
Who looked better, Kristin Cavallari or Rihanna? Vote below ...