With thanks to P.S.: Belinda Carlisle's son, Duke (he of the Trailblazer Campaign), joined the Go-Go's on stage at Westbury as the sixth Go-Go, singing on the group's 1994 song "The Whole World Lost Its Head." It's adorable! It looks like if he really let loose, he'd be rocking something close to his mom's signature moves.

Maybe Duke and Lola should form a Book of Love-style group? Video after the jump...