"How to Be a Heartbreaker" is a song by Welsh recording artist Marina and the Diamonds from the American version of her second studio album Electra Heart (2012). It was released on 7 December 2012 by 679 Artists and Atlantic Records as the third and final single from the record. Diamandis worked with Ammar Malik, Benny Blanco, Cirkut, Daniel Omelio, and Dr. Luke during the songwriting process, and enlisted Blanco, Cirkut, and Dr. Luke to oversee its production. The song was covered by Dean Geyer and Lea Michele on the Glee episode "Feud".