Look out, he'll kill you with cuteness! Zac Efron is back (and yeah, we know he hasn't really gone anywhere). The superstudmuffin and über-genial High School Musical star gets his twinkly-smiley thing cranking while remaining charmingly humble in this backstage vid for his Teen Vogue cover shoot.
Even in featherweight fluff like this, Zac is the mack. Sigh.