Jennifer Hudson performed a tribute to Clive Davis Saturday night by singing a medley of hits by the music mogul’s late protégé Whitney Houston. Davis was honored with the Spirit of Hope Award at the Multiple Myeloma Research Foundation fall gala. But the highlight of the night, according to spies, was when Hudson performed Houston classics including “I’m Every Woman” and “How Will I Know.” The crowd at the Hyatt Regency in Greenwich, Conn., responded by getting on its feet.