Here is Jessica Biel showing off her fit body and that tight perky ass of hers as she take a dip in the Caribbean sea on Friday while vacationing in Puerto Rico. And Jessica Biel was seriously flaunting her amazing physique in a tiny bikini bottom. A straight guy would never tire of looking at her butt as she walk around a beach. Although she was covered up on top, the 30 year-old actress left very little to the imagination when it came to her bottoms. And that is no surprise… This chick’s ass is one of the most famous and admired in all of Hollywood, and we can clear see why in these paparazzi candids. Enjoy! Click on pictures to enlarge.