The FBI kept a 128-page file on Whitney Houston with details that included an alleged blackmail demand, a payoff by the singer and extensive 11-year monitoring of the star by the Feds, Breaking Celebrity News is reporting.

The file, just released by the FBI, shows many letters to Whitney were sent to government laboratories for analysis and attempts to lift latent fingerprints.

One page is marked “Whitney Houston victim extortion” although the FBI later concludes that no crime was committed and it appears that the singer and