I bet Jonathan played with Barbie as a kid.
Cool wall mirror made up of 1950s repro Barbies. If you're so inclined, you can make your own over-the-top Barbie decor here and here.
As for some of the house, especially the bedroom, I picture a leathery tan 70 year old with a lap dog named Bootsie living there, not Barbie. But I guess if Barbie were real, she'd be a leathery tan 70 year old (since she looked 20 at birth).