A large group of senior citizens, organized by the Arlington Department of Parks and Recreation’s Office of Senior Adult Programs, participated in a “flash mob” at the Arlington County Fair this afternoon.

The seniors — who were later joined by fair-goers during a reprise — performed a choreographed dance to the Black Eyed Peas song “I Gotta Feeling.”

A video of the performance, and an interview with dance leader, choreographer and Ms. Senior Virginia 2012 Kathy Fanelli, is below.