Ripped Zac Efron flexes his muscles as he hits the beach for Independence Day party

By SARAH BULLRipped: Zac Efron flexes his muscles and delights armies of female fans as he shows off his buff body on the beach on MondayHe had to bulk up to play a marine in his last film The Lucky One.And it seems Zac Efron has been sticking to the same diet and exercise regime, judging by photographs of the 23-year-old actor on the beach on Monday.Former High School Musical star Zac showed off