The High School Musical star — who’s currently dating actress Vanessa Hudgens — says he always makes sure he’s well-groomed.  “There are little things you have to forgo [as a celebrity],” he said. “If you walk around in sweatpants and don’t shave or shower, or look a bit sleepy, there’s a high probability that there are going to be rumors out there that you’re on drugs or starting some sort of spiral downhill. “So I’ve always tried to look my best, and look clean when I go outside. I think I owe it to everybody to show up well-groomed and put in a little effort. It’s the least I can do.”  Efron admits fame has its drawbacks. “There are small things you definitely miss,” he said. “The thing about it is if you comment on it [fame], or talk about the negativity around it, it’s not really comprehensible to anybody.”