Slave to a hula hoop
This is Grace Jones, singing "Slave To The Rhythm" as she hula-hoops. Through the entire song.
It’s a sign of how body-focused I’ve become that after I got done being amazed, I found myself thinking, "Hula hoop. That’s good, cheap core exercise."
This does not mean, however, that there will ever be Youtube footage of me singing anything while hula hooping.