"You've Changed" is the lead single released from Sia's 2010 album We Are Born. "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. The single was announced through a Twitter update that Sia posted. The song was given away for free and was released on 28 December 2009. On 31 January 2010 the song peaked at number 31 on the Australian ARIA Singles Chart, becoming Sia's highest charting single on that chart until her 2014 hit "Chandelier". The song was placed 72 on the Triple J Hottest 100 countdown in 2009.

Sia Kate Isobelle Furler is an Australian singer and songwriter. Born and raised in Adelaide, she started her career as a singer in the acid jazz band Crisp in the mid-1990s. When Crisp disbanded in 1997, she released her debut studio album, OnlySee, in Australia. Sia moved to London and provided vocals for the British duo Zero 7. She released her second studio album, Healing Is Difficult, in 2001 and her third, Colour the Small One, in 2004.