By weird chance, I was watching Stargate SG-1 yesterday (with the character Sam Carter), and also sang a Peter Frampton song at one of my cats this morning.
It's both of these things - I had a quick look and scrolled to the bottom. It was the one I was thinking of. The final pun is based on pronouncing "lever" like "levver" instead of "leever".
Is this a one-off or a common thing? I'd love to see more cat piano improv :)