The legendary singer Dionne Warwick tweeted, “Kenan Thompson has been on SNL for as long as I’ve been alive. A very talented and funny young man” in the early evening on Dec. 12, which seemed like foreshadowing that she would turn up on that night’s episode of the NBC late-night sketch comedy series. And that she did, in the form of cast member Ego Nwodim portraying her for a “Dionne Warwick Talk Show” sketch.