Plot: Barbara Cook, Neil Diamond, Yo-Yo Ma, Sonny Rollins and Meryl Streep are the honorees at the 34th annual celebration hosted by Caroline Kennedy. Performers and presenters include Bill Cosby; Robert De Niro; Herbie Hancock; Anne Hathaway; Jennifer Nettles; Mike Nichols; Sarah Jessica Parker; Lionel Richie; Smokey Robinson; James Taylor; and Tracey Ullman