Out west, Ashley Tisdale popped a pose while hanging at the Venus Pool Club at Caesars Palace in Las Vegas. The "High School Musical" actress turned 26 on July 2, but was enjoying a belated birthday weekend celebration with friends. Denise Truscello/WireImage.com - July 16, 2011
Celebs Have Fun in the Sun
Stars from Serena Williams to Ashley Tisdale break out their bikinis.