High Quality Content by WIKIPEDIA articles! "You Lost Me" is a song by American recording artist Christina Aguilera, taken from her fourth studio album, Bionic (2010). Described by Aguilera as the "heart of the album," the song was written by Aguilera and Sia Furler, with the song`s producer Samuel Dixon. Lyrically, the song talks about a cheating man, who has left the world in Aguilera`s view as "infected". The song was released on June 29, 2010 by RCA Records, as the second and final mainstream single from Bionic. A radio edit was released and gained comparisons to artists like Phil Spector and the Wall of Sound.