Best known for: Being arrested and later jailed for running a highly successful and equally illegal prostitution ring to the rich and famous in America.

Dubbed 'The Hollywood Madam', Fleiss sold the rights to her life story to Paramount Pictures in 2004 for a reported £3.1 million. She says: "I don't think prostitution is a career... but maybe a little stepping stone?"

Fleiss still refuses to name her clients but will the CBB house be the place she'll reveal her secrets? It's unlikely, though you never know.

Odds: 20/1