Mark Ronson: No one will compare to Amy Winehouse

Mark Ronson doesn't think any singer will ever compare to Amy Winehouse. The 39-year-old star produced the late singer's hit record 'Back to Black', her second and final studio album before her death aged 27 in July 2011, and he insists nobody will ever come close to matching the 'Rehab' hitmaker's talent and energy in the studio.