Mark Ronson is an English guitarist and also singer. His sophomore album, Version, features a cover of "Valerie" by The Zutons, which features vocals from Amy Winehouse. Ronson also worked extensively with Winehouse on her sophomore studio album, Back to Black. His work with her includes "Rehab", "You Know I'm No Good", "Back to Black", "Love Is a Losing Game", "Wake Up Alone", and "He Can Only Hold Her." Ronson also produced Winehouse's cover of "Will You Still Love Me Tomorrow?" and "Valerie ('68 Version)", both of which appear on the posthumous compilation, Lioness: Hidden Treasures.