Name: Kristina and Karissa Shannon

Ages: 22

Official website: shannontwins.com

Famous for: Glamour models

Bio: The twin sisters from Michigan first came to the public’s notice after they moved into Hugh Hefner’s Playboy mansion in 2008 to become two of the ageing lothario’s girlfriends. As a result, they were featured on US reality series The Girls Next Door before becoming Playmates of the Month in Playboy magazine.

While they’re far from well known here in the UK, having a pair of bikini-clad twins in the house surely won’t hurt CBB’s ratings…