DAY AND LIGHT: Leighton Meester and Vera Wang will be lighting the Empire State Building in red and white on Thursday at 10:30 a.m. The lighting will be part of a campaign to raise awareness of the need for bone marrow donors. They’ll also join Coty chief executive officerBernd Beetz and DKMS chief operating officer Katharina Harf in honoring the 5th Annual DKMS Gala, to be held at Cipriani Wall Street Thursday evening. Meester is the face of Wang’s latest fragrance, due out from Coty Prestige this fall. The Gala will feature a performance by Mary J. Blige and will be emceed by Pharrell Williams, with expected guests including Rihanna, Iman, David Bowie, Solange Knowles, Eva Mendes and Cyndi Lauper.