From the Grease Soundtrack, and movie, comes their big hit, You’re The One That I want. They make a great looking couple then, and they make a great looking couple now. Danny and Sandy will live forever.
This #1 hit was not in the original stage version of Grease and was added just for the movie. The great part of it is that this became #1 before the movie was released! Not riding on the coattails of the equally great movie.