"How to Be a Heartbreaker" is a song by Welsh singer Marina Diamandis, released under the stage name Marina and the Diamonds, from her second studio album, Electra Heart (2012). It was released on 7 December 2012 by 679 Artists and Atlantic Records as the album's third and final single. Diamandis worked with Ammar Malik, Benny Blanco, Cirkut,...