Shrieks of delight rang out around a Harlem school hall when superstar singer Beyonce strolled in to take part in a dance session.
Students at a New York school were in the middle of performing a choreographed routine to a track by the 29-year-old, when she made a surprise appearance and got in line with the dancing pupils.
But to their credit, the shocked youngsters didn’t miss a beat, despite performing alongside a world famous entertainer. They carried on with their four-minute dance with huge smiles on their faces.
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Beyonce and the students were taking part in a 'flash dance' as part of Michelle Obama's Let's Move campaign.
This involved more than 600 schools around the US simultaneously performing the same pre-choreographed routine in an effort to encourage students to get in shape.
Beyonce's specially-recorded tune, Move Your Body, was the track used for the mass workout. So it was fitting that she was on hand to join in the fun.