Electra Heart is the second studio album by Welsh singer-songwriter Marina Diamandis, released under the stage name Marina and the Diamonds. It was released on 27 April 2012 by 679 Artists and Atlantic Records. Diamandis collaborated with producers including Liam Howe, Greg Kurstin, Dr. Luke, Diplo and Stargate during its recording, and subsequently transitioned from the new wave musical styles seen throughout her debut studio album, The Family Jewels (2010). Their efforts resulted in a concept album consisting of electropop and dance-pop music, a distinct departure from her earlier projects. Lyrically, the album discusses topics of love and identity. Diamandis created the title character "Electra Heart" to represent female archetypes in popular American culture (House Wife, Beauty Queen, Homewrecker, and Idle Teen).

Music critics were divided in their opinions of Electra Heart, expressing ambivalence towards Diamandis' shift in musical style and its overall production. However, the album retrospectively earned the status of a cult classic, with Rolling Stone listing it among the 50 greatest concept albums of all time. The album debuted at number one on the UK Albums Chart with first-week sales of 21,358 copies. In doing so, it earned Diamandis her first chart-topping album there. The album was eventually certified gold by the British Phonographic Industry (BPI) for exceeding shipments of 100,000 units. Electra Heart performed moderately on international charts, including a peak position of number 31 on the US Billboard 200, and became Diamandis' highest-charting album in the United States at the time selling an estimated 11,000 copies. The album was eventually certified gold by the Recording Industry Association of America (RIAA) for exceeding shipments of 500,000 units.

Electra Heart was supported by three singles, all of which were supplemented by music videos. "Primadonna" was released as the lead single from the album on 20 March 2012, and peaked at number 11 on the UK Singles Chart. Follow-up singles "Power & Control" and "How to Be a Heartbreaker" were respectively released on 20 July and 7 December, and reached numbers 193 and 88 in the United Kingdom. Promotional single "Radioactive" charted inside the top 40 in several countries. The album was additionally promoted by Diamandis' headlining The Lonely Hearts Club Tour, which visited Europe and North America from May 2012 through May 2013.