Epic Records has released the original song I’ll Fight from the documentary RBG. The track is written by Academy Award nominee Diane Warren and performed by Academy Award winner Jennifer Hudson. The song is now available to download as a digital single on Amazon. Listen to the full track after the jump. RBG is directed by Betsy West & Julie Cohen and focuses on the life and career of Supreme Court Justice Ruth Bader Ginsburg. The movie scored by Miriam Cutler premiered at this year’s Sundance Film Festival and is being released in select theaters this weekend by Magnolia Pictures. Visit the official movie website for more information.