Vivacious Vanessa Williams captivated the 500-plus black-tie, gowned and bejeweled guests at the 33rd Annual Nevada Ballet Theatre Black & White Gala at Aria on Saturday night. Vanessa gently strong armed David Weinreb, chief executive of our Howard Hughes realty company, into a Broadway show-tunes duet.The twosome sang together as star leads in their high school stage band in Chappaqua, New York, outside Manhattan.