Carrie Underwood is celebrating the first birthday of her son, Jacob.
The superstar singer penned a thoughtful note to her child on Instagram, calling him "smiley," "crazy" and "smart." She also shared photos of his beautiful cake, adorned with a baby figurine on top wrapped in a green blanket.
"Happy birthday, Jacob! How are you already 1 year old?" Carrie writes alongside a gallery of photos of the 1-year-old shoveling the cake into his mouth. "I can’t wait to see your personality continue to shine! I have a good feeling you’re going to keep us all on our toes for years to come! I thank God for you each and every day. You are truly our miracle baby!!! Mommy loves you!"
Jacob is the younger sibling to Carrie and husband Mike Fisher's eldest son, 4-year-old Isaiah.
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