From, presumably, season 3 of Sha Na Na:
Some of you probably don't know that Sha Na Na's "Screamin'" Scott Simon penned "Sandy", which John Travolta sang in "Grease" in 1978. Going by the Lady in the Window (Jane Dulo)'s intro, this clip comes a year after the movie, as Simon sings his own composition. Better than Travolta? Judge for yourselves.