"Lovebird" is a song recorded by British singer-songwriter Leona Lewis for her third studio album Glassheart (2012). It was written by Bonnie McKee, Joshua Coleman and Dr. Luke, and produced by Josh Abrahams, Ammo and Oligee. "Lovebird" was recorded at Pulse Recording in Los Angeles and is a power ballad, incorporating a piano and synth-driven melody. The lyrics consist of Lewis informing her past lover that enough time has passed since their relationship for her to have moved on and to have developed as a person. Critics praised Lewis' vocal performance, likening her technical abilities to those of Mariah Carey and Whitney Houston. The musical structure of the song was heavily compared to one of her previous singles, "Bleeding Love", along with songs performed by Adele. The accompanying music video shows Lewis trying to escape from a giant bird cage.

To promote "Lovebird", Lewis performed the song on talk shows Daybreak and Loose Women in the United Kingdom, in addition to singing competition La Voz in Spain. Nonetheless, "Lovebird" sold fewer than 600 copies upon its release, failing to attain one of the top 200 chart positions on the UK Singles Chart; however, two weeks after the release of Glassheart, "Lovebird" peaked at number 22 on the South Korea Gaon Single Chart due to strong digital download sales.

On New Years Day 2012, a low quality snippet of "Lovebird" leaked under the title "Love Birds". After the song leaked, Lewis expressed her frustration at the song being available for listening to on the Internet, stating: "I'm sad that one of my songs leaked. As an artist that holds music dear to my heart I would've liked to share it with u [sic] when it's ready. I hope that you feel it like I do and when it's time to be released you'll still support it in the right way. Thank u [sic] for the love." That same month, it was announced that the album was expected to be released on 26 March 2012. Record executive Simon Cowell later publicly give his support for Glassheart, saying to Lewis that, although there had been a lengthy wait of two years for new music, the album was "sensational", and that Lewis had "never sounded better."

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