That's grandma to you, sir. I like the Boys Keep Swinging video for it's combination of edgy, sexy and goofy maneuvers. It's 1979, you're already getting heat (read: censored) for the line "when you're a boy, other boys'll check you out", why not dress up as your own backup singers and strut down the catwalk?
The last one... so stern and tweedy. Rrrrrow!