Spears and her ex-fiancé, Casey Aldridge, welcomed Maddie in June 2008 before the pair subsequently split up. She and Watson got engaged in 2013 and tied the knot in New Orleans in March 2014.
This birthday and Father's Day are particularly special for Spears and Watson after their daughter was hospitalized in February following a terrifying ATV accident, in which she was submerged in a pond on the family's property for two minutes.
Maddie made a full recovery in the following weeks, but her mom has been very vocal about the lessons the frightening ordeal taught her about life. Check out the video below to hear more from Spears about her daughter's amazing recovery.