Former X Factor judge Tulisa Contostavlos has been charged with intent to supply Class A drugs.
Baljit Ubhey, CPS London Chief Crown Prosecutor, said: "The Crown Prosecution Service has authorised the Metropolitan Police Service to charge Tulisa Contostavlos, 25, with being concerned in the supply of Class A drugs.
"This charge relates to an investigation by the Sun newspaper between March and May 2013 which resulted in the supply of Class A drugs to an investigative journalist.
"This decision to prosecute was taken in accordance with the Code for Crown Prosecutors.
"We have determined that there is sufficient evidence for a realistic prospect of conviction and that a prosecution is in the public interest."
The story published in the tabloid alleged that Contostavlos acted as a fixer by introducing a journalist to an alleged supplier during a meeting at London's Dorchester Hotel.
She was approached by an undercover reporter and was said to have boasted: "Of course I can get it for you. Half the guys I know are drug dealers."
The Young hitmaker is scheduled to appear before Westminster Magistrates' Court on 19 December.