Nicky Hilton celebrated New Year's Eve in Miami with bikini fun alongside her boyfriend, James Rothschild. On Monday, Nicky soaked up the sun with James at a local beach in a bandeau bikini with a cat's face on the front. That same day, she swapped into an animal-print string bikini while lounging near a pool with her man. Nicky wrapped up the year after spending the holidays close to her family. Nicky had a Christmas party with sister Paris Hilton at their mother's home in LA before the two flew off to Miami to ring in 2013 together with their guys. Nicky's boyfriend, James, is an heir to the Rothschild banking fortune and the pair have been dating since early 2012.