The proud mama posted a photo of her youngest daughter in a green princess dress while holding an amazing looking cake. Tallulah accessorized with a fabulous tiara and, most importantly, a cute smile that proved how happy the birthday girl is.
"Happy Birthday my little Tallulah Boo. You are pure magic!" Moore wrote in the caption of her post. "The world is better and brighter with you in it, my love. You are a gift and a blessing."
Demi continued, "I am so honored you choose me to be your mother. Your light is so bright already I can’t wait to see what happens when you are ready to turn it on full blast! I love you beyond measure, sweet angel!"