Jennifer Lawrence stopped by the Late Show With David Letterman on Wednesday to promote The Hunger Games: Mockingjay — Part 1 after premiering the film in London earlier this week. While we saw her arrive at the Ed Sullivan Theater in NYC wearing a low-cut red frock, Jennifer slipped into a black dress and white blazer for her hilarious interview. Jennifer talked about having to face her fear of singing in public while filming the highly anticipated movie — her character, Katniss Everdeen, sings "The Hanging Tree" to a Capitol cameraman, bringing him to tears — and revealed that since she was 8 years old, she possessed a "tone-deaf Amy Winehouse" voice that her parents made fun of while simultaneously telling her how great she sounded. She and Dave then go on to perform a rousing rendition of "Have a Holly Jolly Christmas." Watch the video above now.