No Joke ,, I could have been a pip ... saw her at the hatch shell with wifey few years back ... so much soul ..
YouTube - You Are The Best Thing That Ever Happened To Me (http://www.youtube.com/watch?v=8FT5QF4JZUA&feature=related)

Good stuff !
Like Joe Cocker, she took quite a few hits and made some great versions of her own.
Couldn't find a good live version of this one.
YouTube - The way we were - Gladys Knight and the Pips (http://www.youtube.com/watch?v=PJ6VagBP6IU&feature=fvw)

nice ed. Here is my favorite

YouTube - (1973) Empress Gladys & The Pips "Midnight Train To Georgia" (http://www.youtube.com/watch?v=v78-ftcqpNw&feature=related)

If you look close, you'll see that Gladys has a herpes outbreak on her upper lip in that first video. I'm thinking that probably was not the best thing that ever happened to her.