"One man" Performances of old Prog-Rock bands

I saw Rachel play before I'd ever stumbled on this guy. She plays guitar too - with Dweezil Zappa. I noted how sad she was, during her performance at a Keith Emerson tribute, like she lost one of her best friends.

There's another video of this Antione fellow with his daughter, doing "Shiny Happy People", where she sings Kate Pierson's part. Imagine having a dad like that!