‘70s pop star Leif Garrett was sentenced to rehab in 2010 after being arrested for heroin possession in Los Angeles. He decided to go the “Celebrity Rehab with Dr. Drew” route, and claims that the shows producers encouraged him to use drugs before he checked in. “They asked to get some footage of me using, and I said, ‘I haven’t been using,’” he recalled. “They said, ‘We really have to get footage of you using.’ Anyway, I was easily talked into showing them.” The producers deny the allegation. (Kevin Winter/Getty Images)