Article continues below advertisementDemi Moore published a sweet tribute to ex-husband Bruce Willis for his 71st birthday.The actress, 63, took to Instagram on Thursday, March 19, to share never-before-seen snaps of the actor with his 3-year-old granddaughter, Louetta, kissing him on the cheek.Willis - who is currently suffering from dementia - appeared to be in good spirits while cuddling up to the toddler.