On 20 March 2013, KT announced that her fourth album would be titled "Invisible Empire// Crescent Moon", considered as her best by most critics to be her most melancholic album to date.
On 20 March 2013, KT announced on her Facebook page that her fourth album would be titled "Invisible Empire// Crescent Moon". Considered as her best by most critics, it is her most melancholic album to date.