"Invisible Empire // Crescent Moon" is the fourth studio album by Scottish singer-songwriter KT Tunstall. It was released on 10 June 2013 in the United Kingdom, debuting at Number 14 in the UK Album Charts, and on 6 August 2013 in the United States and Canada, peaking number 64. It features a more country folk sound than her previous album, Tiger Suit. The album was acclaimed by critics, that most considered Invisible Empire // Crescent Moon as her best album so far. The album features a mellower, more acoustic sound compared to its electronica-influenced predecessor, 2010's Tiger Suit.