Demi Lovato’s fiancé, make that the mother of the singer’s future hubby, is opening up about her son’s adorable proposal to the pop star, which took place at the singer’s recent concert. Over the weekend, the “Skyscraper” beauty invited 5-year-old Grant on stage mid-show, where the little Lovatic popped the question, much to the delight of the singer, who happily accepted the tiny tot’s proposal. Grant’s mother, Kelly Feikert, told E! News “It was so amazing to see him on stage with her.