One Real Musician and Who?

We went to the Finale Party for the Bellingham Festival of Music this evening. It was at a house owned by a local business man. He owns Rocket Donuts among other things. And his house was pretty amazing... full theater, a real bumper car, pool room, and a drop dead view of Bellingham Bay. In his living room is a piano with an interesting player seated on the bench. When one of the cellists from the Festival Orchestra saw her he had to sit down to play duets with her. Can you tell which is which?