A distraught Britney Spears has been plunged into a secret cocaine nightmare that’s devastating her family and jeopardizing her image.

Just months after ending his 30-year marriage, Britney’s father Jamie Spears has spun out of control, partying wildly in a world of seedy cocaine users and dangerous mobsters who law enforcement sources warn could use Jamie to get to Britney.

The issue that goes on sale Friday features an eyewitness account of Jamie’s young girlfriend snorting coke in a New York club, reveals Britney’s worst fears about her dad … and more.