Bradley Cooper is revealing he once had a drug and alcohol addiction. He made those revelations on the podcast "Smartless," co-hosted by his friend and former roommate, actor Will Arnett. Cooper also credits Arnett for saving his life. He says he overcame his addiction before his breakthrough role in "The Hangover." The actor also says having a daughter with his ex-girlfriend, supermodel Irina Shayk, has helped him stay sober.