*The National Enquirer is claiming that Janet Jackson and her billionaire fiance Wissam al Mana are planning a lavish $20 million wedding  to take place next year in Doha, Qatar, where al Mana was born.

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According to an insider the wedding will be ”one of the biggest, most memorable extravaganzas in recent history.”

”They have tentatively set a late 2013 wedding date. But they are still working out the details and the exact day,” the source continued.

They will reportedly spend $3 million to fly in 500 wedding guests from all over the world, while Wissam wants to give all attendees a $10,000 Rolex watch each as a thank you for attending.

The insider added: ”Wissam is going to splash big when he marries Janet. It’s going to be the wedding of the century.”

Janet, 46, has been dating Wissam – who is almost a decade younger than her – since summer 2010.