Never let it be said that Bradley Cooper doesn't do his homework. Not only did he prep for working with Jennifer Lawrence on Silver Linings Playbook by watching X-Men: First Class, he also sat down to The Hunger Games. The BC verdict? "Oh my god! That's a brutal movie." Putting talk of tracker jackers aside, Empire chatted to the star of David O. Russell's new movie about his increasingly polished Robert De Niro impression, being told off for said impressions, and borrowing Mandy Moore's dance moves for Silver Lining's classic dance-off.