It read: "My baby is 9 years old today, and more than ever we realize how precious every day is. So, we have to thank these 2 HEROES. John and Victoria are the first responders, who literally saved Maddie's life
, and they were able to celebrate her another year of her life with us this past weekend!" the 26-year-old singer wrote. "Thank God for these amazing people, and thank you God for your amazing grace."