N-Dubz singer Tulisa Contostavlos was put on suicide watch by her manager after newspaper reports that she had been involved in a drug deal.
Jonathan Shalit, who represents some of the country's biggest stars said the former X Factor judge had also been targeted by "horrific abuse" online.
He told the Edinburgh television festival this evening:
She got to the point I was worried she would commit suicide.
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.
If you are in distress and need some support, the Samaritans are available 24 hours a day on 08457 90 90 90 or click here for their website. For those in the Republic of Ireland 1850 60 90 90.