Celebrity Rehab Success Stories

With time and treatment, stars like John Stamos, Selena Gomez and Jon Hamm found the way from rock bottom to tip-top shape

ZAC EFRON

Days after stepping out with a smile at September 2013's Toronto International Film Festival, a source confirmed to PEOPLE that Efron was, indeed, "doing great" after quietly completing a rehab stint about five months before. The High School Musical alum's squeaky-clean public persona was contrasted by his low-profile partying ways that lead him to the club scene and after-hour gatherings at friends' homes. Efron changed his habits with the help of treatment. "He's taking care of himself," added the source, "and it shows."