Housemate CalistaHousemate CalistaKelly Osbourne joined the Big Brother: Celebrity Hijack clan...

And guess what she got up to?

Well, Kel had a whale of a time.

Not in the House you understand, but playing the role of the official House Hijacker.

Kel ordered Victor to make tea, and then got the Housemates dressed in some serious rock and metal clobber.

The point of all of this?

A mosh pit and a death metal-themed knees-up.

But it wasn't all fun and games.

Kelly called the Housemates into the diary room and they all had to start nominating who they wanted to leave the House.

Getting the contestants to spill the beans on their fellow Housemates is a tough job, but someone's gotta do it, right?

Kelly OsbourneKelly OsbourneEverything in the way of nominations will be revealed later, so watch this space.