Kristina and Karissa Shannon enters the Big Brother House

Celebrity Big Brother contestants four and five (or do they just count as one?) are… Kristina and Karissa Shannon.

We have it on very good authority (Googled it) that these girls are Playboy models/bunnies/tenants – not entirely sure of the job title.

The twins told Brian that they were very cold in their outfits, and that it is possible to tell them apart because Kristina is a tiny bit taller.

They join Natalie Cassidy, Michael Madsen and Andrew Stone in the ski-lodge hiz-ouse.