About 85 students at P.S. 161 in Harlem were in the middle of a choreographed routine Tuesday to a song adapted from Beyoncé ‘s hit “Get Me Bodied” when the singer arrived.

The children were participating in a national simulcast of “Let’s Move Flash Workout.” It’s part of first lady Michelle Obama’s fitness campaign.

The singer joined in wearing stiletto heels and a T-shirt emblazoned with “Let’s Move.”

Thirteen-year-old Aisha Collier gushed “she’s so beautiful.” She told the New York Post she messed up a little when Beyoncé first arrived but then got back into it and continued to dance and have fun.