THE DUET THAT MADE ROCKEFELLER GO SILENT: The Moment Reba McEntire & Kristin Chenoweth Whispered ‘Silver Bells’ and Turned One Cold New York Night Into the Christmas People Thought They’d Lost Forever — Kids Asked Why ‘Everything Was Glowing,’ Grown Men Admitted They Believed in Magic Again, and Fans Are Still Arguing Over What Exactly Happened in That Last Shaking Breath