HOLLYWOOD - Britney Spears has denied allegations of substance abuse after testing positive in a court-ordered drug test, insisting the results only show the medication she has been prescribed by doctors.

The troubled pop star, 25, must undergo mandatory drug and alcohol tests as part of an earlier court order relating to her custody battle with ex-husband Kevin Federline.

But Spears has been accused of skipping eight of out 14 requests in recent weeks, and was recently chastised by Los Angeles Superior Court Commissioner Scott Gordon for not making herself readily available for the tests.

And there's more bad news for Spears, after Web site TMZ.com claimed one of her test results came back positive last week.

But pals insist Spears is innocent of any illegal-drug allegations.

A source close to the star says, "The only thing that comes on the results are the prescriptions that the court doctor prescribed.

"There has been no illegal drugs or even alcohol in any of the test results."

http://www.hollywood.com/news/Spears_Positive_Drug_Test_Is_Just_Prescription_Meds/4986125