A source said that Qatari billionaire Wissam Al Mana “gave Janet Jackson a huge, expensive ring” earlier this year.

“She’s afraid it will get lost, so she keeps it locked up!”

The luxury-brand mogul, 37, will spare no expense on his nuptials to Miss Jackson, set for spring in Qatar.

The affair “will cost millions,” reveals a second Jackson insider. “He is flying in all of Janet’s friends and family on private jets.”