Probably Zac Efron. I only noticed how often I saw him when my friend told me about a dream he'd had, in which he went to a Broadway play and Zac Efron sat behind him. He said to him, "Haven't we seen enough of you?", then opened his program, where there was a High School Musical splash with Efron's face. "There, see? Go home." It's probably more to do with his huge, angry face all over buses than on film, but still.