Zac Efron fit in a little retail therapy in LA yesterday, hitting up the Urban Outfitters sale with a group of friends that included Rumer Willis. Zac is spending the start of his Summer on the West Coast and was by the beach over the Fourth of July weekend, which also included his High School Musical costar and good friend Ashley Tisdale's birthday. Zac Efron and Ashley Tisdale partied in Malibu in their swimsuits on Saturday as she celebrated turning 26. Zac and Ashley splashed around, and he was even spotted giving her a piggyback ride. The two have been friends for years, and while Zac has been living the single life since his split from Vanessa Hudgens in December, Ashley was quick to respond to rumors that the two might be dating by saying she is still seeing boyfriend Scott Speer. On Monday, Zac Efron was on his own and shirtless to celebrate Independence Day with friends. Zac has also been enjoying his break from the big screen lately, but next up, he'll appear in the thriller The Paperboy alongside Matthew McConaughey.