"Everybody is becoming more knowledgeable about Duke Ellington and his music," LaBelle, who recently recorded a solo jazz album, told Playbill magazine. "It was great music... I've always liked jazz, ...

After Midnight will also welcome Gladys Knight and Natalie Cole (in her Broadway debut) as guest-star vocalists this summer. Knight will play July 8-Aug. 3 with Cole performing Aug. 5-31. "Everybody ...