"You've Changed" is the lead single released from Sia's fifth studio album We Are Born.

[3] "You've Changed" was originally co-written and released in 2008 by American DJ/producer Lauren Flax, which was then re-recorded for Sia's 2010 album, We Are Born.

In the United States, the original Lauren Flax version reached number 47 on the Billboard Hot Dance Club Songs chart in April 2010.

Luke O'Neil of the Boston Globe wrote "It’s a pulse-quickening electro-disco cut with gritty, heartfelt soul falling out of its tight pants pockets.

"[4] Johnathan Keefe of Slant said "You’ve Changed" was originally recorded as a shrill, tinny dance track, but Kurstin reworks it here to include a funk-based rhythm section that gives the song a more propulsive 4/4 beat and a greater depth of texture.