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

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.

The news comes following celebrity blogger Perez Hilton posting information which leaked last week regarding a possible album title ('LUV') and several song titles for her upcoming studio effort. The album is expected to be released in late March.

In other Madonna news, fan site Drownedmadonna.com reports that in the summer of 1996 Madonna declined a request from the late John F. Kennedy Jr. to appear on the cover of his magazine 'George' dressed as his late mother Jacqueline Kennedy Onassis. A new book written by the son's assistant Rose Marie Terenzio and titled 'Fairy Tale Interrupted' says the singer wrote a letter thanking him for the offer but adding "I would never do her justice."

"My eyebrows aren't thick enough for one," Madonna wrote. "When you want me to portray Eva Braun or Pamela Harriman I might say yes! Hope you're well" Braun was the mistress of Adolf Hitler while Harriman was a British socialite married to Winston Churchill's son Randolph. The magazine eventually went with Drew Barrymore dressed as Marilyn Monroe on the cover.