According to new allegations, John Lennon had an affair with tragic sixties pop star Alma Cogan, who died from cancer at the age of 34, whilst he was married to first wife Cynthia. Cogan's sister, Sandra Cohen told the Daily Mail: "I knew about Alma and John, of course, but it was something no one admitted because John was married. We had a very strict Jewish upbringing and my mother would never have approved of a relationship between Alma and a married man".
Of course, it's not a huge surprise - it's claimed Lennon was unfaithful to Cynthia many times during the course of their six year marriage.