With the R&B diva’s drug habit raging out of control, her entourage recruited a drug dealer who sold her $6,000 worth of cocaine during a tour stop in Europe in June, an eyewitness to the deal revealed.

Although the 46-year-old singer claimed to be drug-free during her TV interview with Oprah Winfrey, she was actually high as a kite at the time, said a source.

And while she’s been through rehab at least twice, an in-depth investigation has discovered Whitney has spent an average of $6,300 a week on drugs or an astonishing $327,600 a year!

“Whitney is a dead woman walking! With the amount of drugs she’s buying, she won’t be able to live long. She’ll be dead in months,” her friend Marlon David, a party promoter,has revealed.