jjackson101610_02_X17crop230.jpgJanet Jackson is ready to walk down the aisle again!

The 46-year-old singer is engaged to Qatari billionaire Wissam Al Mana, according to Us.

A source tells the mag that Al Mana, 37, gave Jackson "a huge, expensive ring" and "she's afraid it will get lost, so she keeps it locked up!"

An insider adds, "He is flying in all of Janet's friends and family on private jets. He wants to get a top chef to create a custom menu."

This will be Janet's third marriage. She split from Jermaine Dupri back in 2009 and had previously been married to El Debarge.

The source says, "She wants kids. If she can't have them, she will adopt."

Congrats, Miss Jackson!