The Hills alum shared a new TikTok celebrating her son Sonny Sanford 's kindergarten graduation on Tuesday, June 4. The graduating class surprised Port, 39, with their unexpected song choice.

Suddenly, it grips you: The pomp! The circumstance! The sudden urge to find the best preschool graduation gifts for your child and every Taylor, Tyler and Thailer in the class!

The graduation wasn't the first time that Port and Sonny had a special moment with "Unwritten." In 2018 -- when her son was 11-months-old -- Port shared a video of her singing along to the pop hit.

This year’s theme was “Changing, Glowing, and Growing!” Liam Hernandez, 4, has autism. His mom said he is now thriving. Noah Jacob Walker, 4, from Flatbush, had a blast on graduation day.