Kelly Ripa is throwing it back! The 50-year-old TV personality took to Instagram on Monday to share an 18-year-old pic in honor of Madonna's 63rd birthday.In the shot, Ripa, wearing a black top, smiles as she stands next to a newsboy cap and button up shirt-clad Madonna, who is holding the morning show host's youngest son, the now-18-year-old Joaquin."@madonna and child," Ripa captioned the pic.