Lioness: Hidden Treasures is the first posthumous compilation album by English recording artist Amy Winehouse, released on 2 December 2011 by Island Records. The album features unreleased songs and demos picked by Mark Ronson, Salaam Remi and Winehouse's family, including the first single, "Body and Soul", with Tony Bennett. The album is being released in aid of the Amy Winehouse Foundation. "Our Day Will Come" was the album's second single released on 4 December. This was Winehouse's first single solo single to be released since 2007.