This performance made me stand still and tune out everything going on around me. What a beautiful mashup and duet. This is English singer James Bay and American Idol contestant Tori Kelly. They shared an intensity in this moment that showed they were able to connect musically and drown out the pressure of being at the Grammy's. The songs are Bay's "Let It Go" and Kelly's "Hollow." Bravo!!! Thank you Grammy's for giving us this performance.