[5] However, problems occurred on the day of the supposed release, and Diamandis took to her Twitter to explain the situation: "So, someone at my record label won't let me release the video because I look ugly in it apparently and we need more money and time to paint out ugly parts.

[10] The song ranks as Marina's fifth best-selling track to date in the United Kingdom, with 95,000 combined sales as of February 2019.

[13] The single was certified Platinum by the Recording Industry Association of America (RIAA) in June 2021.

[14] Diamandis first performed "How to Be a Heartbreaker" live on 29 June 2012 on The Lonely Hearts Club Tour at the HMV Institute in Birmingham.

[16] She has performed the song acoustically on various radio stations and television appearances in Europe and Canada.

[17] Diamandis performed "How to Be a Heartbreaker" live on the season finale of Denmark's X Factor on 22 March 2013, along with "Primadonna".

[18] The song was covered by Dean Geyer and Lea Michele on the Glee episode "Feud".