Just chillin' out tonight listening to the best of the best. Ella, singing "Summertime" during her legendary performance at Berlin in 1968. It just doesn't get any better than this.
I once saw an interview with Mel Torme in which he was asked who his favorite singer was. His response was, "You mean after Ella?" I concur wholeheartedly.
UPDATE:
After reflection I decided that you indeed can do better -- just add a dash of Satchmo.
Aaaaaaaaaah bliss!