Jessica Biel and on-again boyfriend Justin Timberlake were together in Las Vegas yesterday for a charity golf tournament at the Summerlin course. The Shriners Open, which officially runs from last Sunday until Oct. 2 for pros, is an annual event organized by Justin to benefit the Shriners Hospitals For Children. The timing was convenient for JT, who was in Sin City last weekend for the iHeartRadio Festival. It also worked for Jessica, since she has a break in her filming schedule. She was last in NYC doing reshoots for her upcoming comedy, and her efforts can be seen in the just-released New Year's Eve trailer.