A man has been arrested for allegedly blackmailing Casey Donovan, after sending the singer a "threatening" text message.
NSW Police released a statement overnight saying that they had taken a 33-year old man into custody.
The man is believed to be a friend of the ex-Australian Idol winner and was taken to the Bankstown Police station overnight.
"Police attached to Bankstown Local Area Command commenced an investigation, following reports from a 29-year-old woman, that she was allegedly being blackmailed.
"Following inquiries a 33-year-old man was arrested at a home in Lalor Park just after midnight on Tuesday January 23.
"He was taken to Bankstown Police station and charged with blackmail and use carriage service to menace."
No further details about the man were given.