It's official: 2015 is the year of appreciating Zac Efron [1]'s nearly naked body. The actor has worked on three movies so far this year, and he's been shirtless [2] — if not in his underwear — in all of them. Zac's most recent adventure found him on the set of Neighbors 2 in Atlanta, just this week. He wore tiny orange shorts and proceeded to twerk, flex his muscles, and grab his bulge in front of a huge crowd. Before that, he was all wet and rippling in Hawaii [3] while filming Mike and Dave Need Wedding Dates, and back in April, he overwhelmed us while wearing nude underwear [4] on the set of Dirty Grandpa. Clearly, Zac's girlfriend, Sami Miró [5], is one lucky girl. Keep reading for what might be our favorite pictures of him ever.