An outside investigation has cleared "American Idol" judge Paula Abdul of charges levied by former contestant Corey Clark, the Fox Network announced Friday.

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Fox, FremantleMedia and 19 Entertainment hired outside counsel to investigate Clark's charges that he had a sexual relationship with the former Lakers Girl -- and that she gave him advice on the side to help him through the competition.

The 600-hour investigation spanning three months failed to substantiate any of the charges Clark made against Abdul, Fox said in a news release Friday.

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The investigators interviewed 43 witnesses, including Clark and Abdul.

Fox, FremantleMedia and 19 Entertainment issued a release saying Abdul will continue as a judge on "American Idol."

Produces also announced implementation of a "non-fraternization policy" to protect the integrity of the competition.