Madonna Leak: Investigating Inner Circle; JFK Jr Asked her to Dress as Jackie O

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After a man was arrested late last month in Spain for leaking a demo of her single 'Gimme All Your Luvin,' Madonna is now mounting an investigation into how the man received the song -- and reportedly believes the culprit comes from her inner circle.

According to an article yesterday in UK newspaper The Sun, sources believe that a "source of these leaks comes from within Madonna's camp."

The report also states that single tracks "have been exchanging hands for well over $1,000" while hundreds of hours of footage including video and photographs featuring the pop icon have been obtained illegally in exchanges for tens of thousands of dollars. "It is all part of the same deal made by a few unscrupulous characters to line their pockets," the source said.