Jason Derulo gives James Corden dance lessons (photos)

James couldn't believe some of the things he was hearing

"Just kinda silent, until this one girl told me it was weird... Now I'm full vocals, big!"
It all got a bit personal when James asked how many people Jason had shared his bed - which is "a circle" - with at one time.

Unashamed, the singer answered: "I would say about... five, including me."