Jamie Lynn Spears uploaded a loving birthday post on her Instagram to celebrate her daughter's 14th birthday.Maddie Aldridge is Jamie's first child, whom she shares from a previous relationship with Casey Aldridge. The actress and singer has a second child, Ivey, with current husband, Jamie Watson.The Zoey 101 star had Maddie when she was a teenager, and their mother-daughter bond seems to be stronger than ever.