Mademoiselle Juliette is a song by French singer Alizée, which was released as the first single from her third studio album Psychédélices,. It was released September 30, 2007, Alizée's first single in 4 years, the past being "À contre-courant" which was released in October 2003. The song was released September 30, 2007. Alizée appeared on French radio station NRJ three days before the release to promote the song. The single was first made available on the online French music store of Virgin Megastores on September 27, 2007. However, it was rapidly removed a few hours later, and was reported to be a mistake on Virgin's behalf. The song was later added back again the day of the official release.