Janet Jackson and her boo thang are engaged!! Billionaire Wissam Al Mana finally popped the question!!! Now the happy couple is planning an end-of-the-year marriage ceremony. “Janet is head over heels in love with Wissam,” said a close source. “He’s showered her with love, expensive presents and boosted her self-esteem by helping her lose weight and shape up.” Wissam, 36, first brought up a walk down the aisle last fall, when he reportedly presented the Jackson clan beauty with a magnificent 15-carat diamond ring. But Janet, 45, wasn’t ready because she wanted to focus on preparations for her current concert tour, which runs into September. “Now Janet’s telling friends that an official engagement announcement will come by summer’s end, and that she and Wissam will marry in late 2011 and they’re shopping for an even bigger diamond ring to celebrate their official engagement.” The two are anxious to start a family as soon as possible!!!