Happy New Year! Where were you when the clock struck midnight? Celebrities spread out across the country for the biggest party night of the year, including Kourtney and Kim Kardashian in Las Vegas, Lady Gaga and Nicki Minaj in New York, and Vanessa Hudgens and Rihanna in Miami. And that's not all! See all of the hottest photos kicking off 2012 in the gallery now.