6. CHRISTA HELM THE CELEB LOVER WHO KNEW TOO MUCH

She had bit parts in Wonder Woman and Starsky And Hutch, but it was actress Christa Helm’s reputation as a good-time girl for Hollywood’s biggest stars that she was best known for. The gorgeous blonde had been linked to Mick Jagger, Warren Beatty and the Shah of Iran in the lead-up to her death – keeping the sordid details of her A-list trysts in a secret sex diary. When Christa, 27, was found bashed to death in LA in 1977, investigators suspected she was murdered.