Demi Lovato is celebrating her six month anniversary with fiance Max Ehrich. The 28-year-old singer and Max, 29, dated for just a short time before becoming engaged this summer on July 22. Celebrating the event, Demi shared a sweet message on her Instagram Story, written over a clip of Max on his knees playing with their two pet dogs in the grass. “Happy 6 months to my darling, the best father these pups could ever ask for.