Jonathan Shalit, who represents some of the country’s biggest stars, said the singer had also been targeted by “horrific abuse” online.

He told the Edinburgh television festival on Friday: “She got to the point I was worried she would commit suicide”.

He said: “I made sure that someone was at her house for two consecutive nights to make sure she did nothing stupid, because she was literally at that point of she genuinely thought her life was over.”

The singer is currently on bail to late October following her arrest over claims she acted as a go-between in a drug deal.