On Jan 5, Kristin Cavallari celebrates her 25th birthday. It has been a crazy year for Kristin, who starred on Dancing With the Stars, and got re-engaged to her football star beau, Jay Cutler.

Well, here’s to a great year ahead. Leave a birthday message for Kristin in the comments and celebrate her big day by checking out her sexiest bikini pics.

Kristin Cavallari