Video: Amy Winehouse Performs 'Valerie' with Mark Ronson

Amy Winehouse, showing off her new breasts, surprised clubgoers at Mark Ronson’s show at the 100 Club in London on Tuesday night (July 6). After throwing back a beer with her pal, the troubled star slurred her way through her Zutons cover “Valerie.”

Amy is prepping a new studio album, forming a supergroup with The Roots’ drummer ?uestlove, and collaborating with Ronson on a song for Quincy Jones’ tribute album Q: Soul Bossa Nostra. Watch her return to the stage below.