Beyoncé at the 40/40 Club anniversary party New York - Arab Today US singer and songwriter Beyoncé joined husband Jay-Z in New York last night to celebrate the 10th anniversary party of his 40/40 Club. The stunning star showed off her curvaceous figure in a white knitted dress with a plunging neckline by Roberto Cavalli. She teamed the dress with heels, a gold clutch, and a simple necklace, keeping her hair straight and sleeked.