Jessica was spotted in Puerto Rico, where she's entertaining her timber lake while he's on the set of the 2013 upcoming Runner, Runner movie.

Jessica Biel's showing the world what it takes to get Justin Timberlake. Yeah, I'm obviously talking about her ass. And I bet Mr. Timberlake's knows it inside out. Mostly inside!

So girls, the secret to get Justin is as follows: Grow an amazing ass like Jessica's, and learn how to give it up. Its inside mostly.