J-HUD PROPOSES TO HER FIANCE: Singer's birthday proposal in December inspires second proposal on his birthday last month.

       According to People.com, the singer presented Otunga – a Harvard-educated-lawyer-turned-pro-wrestler – with a personally-designed, five carat Neil Lane engagement ring.       

       "Jennifer wanted to give him something really special when she asked David to marry her," says Lane, who worked with Hudson for months to design the ring. "It was very sentimental and romantic ... They are really in love."       

       The handmade "architectural and geometric" platinum and diamond men's ring is "masculine, yet has a lot of sparkle," says Lane, who also designed the engagement ring Otunga gave Hudson last fall. "Jennifer and I went through lots of different designs, talked about it a lot and she was very open."       

       The operation nearly hit a snag when neither Hudson nor Lane knew Otunga's ring size. Needless to say, it was too big when Hudson originally gave it to him last month.  So last weekend, in Los Angeles for Hudson's tour dates, Otunga, 29, and Hudson went to Lane's store to get it resized.       

       "They were so lovey-dovey and so sweet to each other," the jeweler tells People. "He was very protective of her and they were so in love."        

       Hudson has yet to announce a wedding date, but has said  that she plans to include her three dogs in the ceremony, perhaps using one as a ring bearer.