Tanya Sweeney: Like Elton John and Madonna I was part of a long friendship feud – until we bumped into each other by chance

Some people, for reasons I wish I could fathom, absolutely love a famous-on-famous feud. It energises them to think of snide insults being traded in the press, lawsuits and counter lawsuits, froideur on the red carpet. They just can’t get enough of this toxic, acidic awfulness.

To them, it’s peak Hollywood, and a tradition that goes right back to Bette Davis and Joan Crawford..