"Boom Clap" is a song by English singer and songwriter Charli XCX, released as the first single from the soundtrack album of The Fault in Our Stars (2014) and is also featured on XCX's second studio album, Sucker. There are two existing mixes of this song: the first and original one is heard in the film, the film's soundtrack, and the music video shot in Amsterdam; the second mix is heard on the music video shot in Japan and in Sucker.