Jayden is certainly looking more grown up
with his braces, and the "Slumber Party" singer loves to share photos of her youngest son and his 11-year-old brother, Sean, on Instagram.WATCH: Britney Spears' Sons Sean and Jayden Look All Grown Up in Matching Outfits
Last May, she penned a heartfelt open letter
to her boys in Time
, calling them her "masterpieces." "I pray as a mother I teach you strength and passion to carry through the struggles in the world. Most battles will always be won on your knees. I pray you find your dreams," she wrote. "God always comes to us in tiny whispers. I pray you always find his whisper and understand the true meaning behind following your inner voice as well."