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"Your Love's a Drug" is a song by American actress and singer Leighton Meester. It was released as the lead single from her debut studio album, Heartstrings (2010), on February 14, 2010. The song was written by Meester, Kara DioGuardi, and John Shanks, and produced by Shanks. The song is a mid-tempo pop ballad with an R&B influence.