Claim: Maggie Gyllenhaal performed in "Crazy Heart".
Evidence: For her performance in the musical-drama Crazy Heart -LRB- 2009 -RRB- , she was nominated for the Academy Award for Best Supporting Actress.
Jeff Bridges plays a down-and-out country music singer-songwriter who tries to turn his life around after beginning a relationship with a young journalist portrayed by Maggie Gyllenhaal.