Having always divided opinion with her controversial private life while ultimately possessing one of the greatest voices of her generation, Amy Winehouse's life came to a tragic end in the summer of 2011. Lioness: Hidden Treasures is an album that features previously unreleased material from the late singer, including a duet with rapper Nas on "Like Smoke" and a touching cover of Ruby & the Romantics' 1963 hit single "Our Day Will Come."