19 Times Zac Efron Was the Hottest Thing About Summer

The former High School Musical siren has been singing his way into our hearts for years, and this summer is particularly special. Zac's gracing theaters with his presence in Neighbors 2: Sorority Rising this weekend, and come July 8th he'll be returning to star in Mike and Dave Need Wedding Dates. But wait, it gets better, because not only will this summer be blessed with Zac's beauty, but next summer will bring us Baywatch (that's right, like Baywatch), and Zac's already given us plenty of heart-stopping sneak peaks on his Instagram (to which all following photos are credited). Here are 19 pics that prove the summer heat has nothing on Zac's sweltering sexiness.