Olivia Newton-John ABC Special from 1976
I found this on YouTube. I think it's really trippy to see Olivia Newton-John in a TV special before Grease, Xanadu, or Physical came out. Also, I never hear her do the Mariah Carey vocal gymnastics that she does in this video so that is cool. However, the best part (and you need to watch this part if you watch any of the video) is the very end when they list all of the guest stars.
You can find all the parts of this special on YouTube if you need them. The song she is singing is "Love Song" from her first major album, If Not For You.
Here is a playlist for the 1976 ABC Olivia Newton-John special if you need it ...
This link will take you to an old video of Olivia Newton-John singing, "Take Me Home, Country Roads", which is a John Denver song that Olivia pretty much made her own.
http://www.youtube.com/watch?v=n-cPvsH1_I8 - I had to just put the link because the person who uploaded it to YouTube is not allowing it to be embedded.