"During the reunion, we're going to have our first ever musical performance," executive producer Chris Coelen says.

As a teenager in 1950s San Francisco, she had been on the brink of a singing career — just like Johnny Mathis, who was two ...

This will mark the Grammy winner's first performance in the history of the show and the TV debut of the new track.

With that out of the way: ladies and gentlemen… it’s the best musical performance from all 50 seasons of SNL.