Molly Sims on the Mexican Pacific Coast, where she spent New Year’s Eve. Splash News Jude Law and Sienna Miller take a ride on a dingy in the Caribbean with his kids. INF Photo Hayden Panettiere in Miami's South Beach area on New Year's Eve. O'Neill / White / INF Photo Hugh Jackman spends his Sunday having a snowball fight with his kids. Hugh was wearing a snow jacket with the logo of one of his previous films, Van Helsing, written on it. Hector Vallenilla / Pacific Coast News Perez Hilton relaxes in Miami Beach. Jeff Daly / INF Photo Marc Jacobs and his boyfriend, Lorenzo Martone, spend the Christmas holiday on the beaches of St. Barth. INF Photo Rihanna pictured with friends going for a boat ride in Barbados over Christmas. INF Photo Russell Brand and Katy Perry go sledding on Hampsted Heath, London. INF Photo Simon Cowell hits the jet ski after the X Factor finale, on vacation in the Caribbean. INF Photo Owen Wilson goes for an afternoon swim in the ocean while on holiday in Hawaii. Splash News President Obama, and first lady Michelle Obama, both wearing leis, wave as they walk over to the crowd at Hickam Air Force Base in Honolulu. Alex Brandon / AP Photo