Usher

On a Sunday flight from LA to ATL, I noticed Usher was sitting in the next row behind me. I was doing the Sunday NYT crosswords on the plane. As I was filling in the acrostic, I noticed that answer "H" was starting to be too coincidentally familiar. I decided that if I completed the puzzle, I would go up to him and ask him to sign it.

And there he is on the flight...

Malcolm Gladwell

WSJ Acrostic puzzle signed in person by Malcolm Gladwell at a Nielsen conference