Jessica Simpson's Son Ace, 12, Stands Taller Than Mom as the Duo Poses Together in Sweet New Snap

Jessica Simpson, 45, is dwarfed by her towering son, 12, in sweet snap

Jessica Simpson's Son Ace, 12, Towers Over Her as the Mother-Son Duo Pose Together in Sweet New Snap

Demi Lovato shows off her 50lbs weight-loss in a plunging sheer gown as she and Jessica Simpson lead the A-list turnout at Grammys afterparty at the Chateau Marmont