Who saw this one coming? Zac Efron, best known for his clean-scrubbed "High School Musical" tenure, has reportedly completed a stint in rehab. According to E! Online, which broke the news, Efron completed treatment five months ago. "He's healthy, happy and not drinking. He's taking time to focus on working," an unnamed source close to the actor tells the outlet. "He's taking care of himself and it shows," another source was quoted in People.