"How to Be a Heartbreaker" is a song by Welsh recording artist Marina and the Diamonds from her second studio album, Electra Heart (2012). The song was written after the original version of Electra Heart was finished, and therefore appears only on the US edition of the album. It was released as the album's third UK single and second US one. The song was covered by Dean Geyer and Lea Michele on the Glee episode "Feud".
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