Surprise! Justin Bobby wowed us all this week with his proposal that he and Kristin Cavallari give it a real shot on The Hills. Taylor Swift racked up the Grammy noms and so did Beyoncé, but what else happened in Hollywood? Mariah's back to her diva 'tude and Miley has found the "hottest person in the world." Who is it? Read on for all the goss!

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