Carrie Underwood went undercover at Dick’s Sporting Goods in Nashville last week to surprise some customers as she assisted them as they perused her line of athletic wear called Calia. Wearing a dark wig, a hat and glasses, Underwood tells customers “she knows the designer of Calia.” But a few savvy customers caught on and recognized Underwood.

Keep watching until the end when Underwood announces a sing-a-long over the store’s intercom system.  Learn more about the Calia athletic wear here.