Sick online attackers have even accused her of devil worship and said they hope she gets cancer.
The 23-year-old said: “I've had people say, 'I wanna kill you and your family'. I've had people say, 'I hope you get HIV and throat cancer at the same time'.”
The Brit Award-winning singer said the hatred had been sparked by a hand gesture she made in the video for her hit Price Tag.
She made an 'OK' sign which to some people can be seen as a sign of the devil.
She added: “It's 666 apparently. To me it's saying OK.
“I think the world has become obsessed with hating things.”