What is you lost me christina aguilera?

"You Lost Me" is a song recorded by Christina Aguilera for her sixth studio album "Bionic" released in 2010. The song was written by Aguilera herself along with Sia Furler and Samuel Dixon and produced by Dixon. "You Lost Me" is an emotional ballad which talks about the heartbreak and the pain of separating from a lover.

The song received critical acclaim for Aguilera's vocal performance and its emotional lyrics. It was also a commercial success, reaching the top 20 in various countries including the US, UK, and Canada. Aguilera performed the song live at various events including the 2010 MTV Movie Awards.

Overall, "You Lost Me" is considered one of Aguilera's most powerful ballads which showcases both her vocal range and emotional depth.