Done said one of his colleagues and a pupil had both “locked eyes” on Jessie outside the toilets at the tourist attraction.
“She was with her family, so initially I said no to the pupils asking her for a photo,” the head teacher said.
But when the group bumped into the artist again, Done said they spoke to the singer, telling her “We sing one of your songs – thank you so much for making it.”
Done said: “She asked the children which song it was, how it had come about.
“And then she went to sing the first line of the song and obviously all the children joined in and she sang along with us.”
Done said his colleagues at Masefield Primary School would love Jessie to share their video with her followers on social media.