Some celebrities are bound to heat up the winter season! Check out some of the stars that showed off their winter bikini bodies in 2013 -- including Kim Kardashian, Heidi Montag, Rihanna, and many more.
Biggest winner? Jillian Michaels tried to keep a low profile with sunglasses and a hat while vacationing in Miami with her daughter, Lukensia, on Nov. 11. The mother-daughter duo were spotted having fun on the sand as the celebrity trainer carried her little tot on her back. During the stroll, Michaels showed off her tight abs in a bikini top and white shorts.