"Who Owns My Heart" is a song by American singer Miley Cyrus for her third studio album Can't Be Tamed (2010). The song was written by Cyrus, Antonina Armato, Tim James and Devrim Karaoglu, and produced by Armato and James. "Who Owns My Heart" was released on October 22, 2010 by Hollywood Records as the second and final single from Cyrus' third studio album Can't Be Tamed only in Europe. It would become her final single and overall release with Hollywood Records after signing with RCA Records in 2013. The song was written about the feelings a club's environment can lead someone to believe. "Who Owns My Heart" is musically club-oriented and driven by synths. Lyrically, the song speaks of meeting a potential love interest at a nightclub.

The song garnered mixed reception from music critics. Some critics argued it was dull and faceless, while other deemed it one of the best tracks on Can't Be Tamed. "Who Owns My Heart" failed to become a commercial success, unlike its predecessor "Can't Be Tamed". It managed to perform moderately in Dutch-speaking, European territories, its highest international peak being achieved in Belgium (Flanders), at number two. It also charted in Austria, Germany, and Slovakia. A corresponding music video for "Who Owns My Heart" was directed by Robert Hales. It follows Cyrus throughout preparing herself for, arriving, and dancing at a mansion party. The video received criticism from the Parents Television Council for its sexual elements. The song, along with "Start All Over" and "Fly on the Wall" are the only singles released by Cyrus that haven't been certified at least platinum in the United States.

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