9. Cory Monteith's Rehab Stint 

Cory Monteith shocked fans of Glee when this spring he admitted himself to rehab for substance abuse. The star – best known for his portrayal of jock-turned-gleek Finn Hudson on Fox's hit show – had spoken previously about his past struggles with drugs and alcohol.{relatedarticles}In a 2011 interview, Monteith confessed to dropping out of high school at age 16 and stealing cash from a family member at age 19. Monteith's co-star and girlfriend Lea Michele has stood by the actor throughout the ordeal.