Adele knows how to bring in a crowd! The "Hello" songstress performed to a sold-out crowd at Radio City Music Hall Tuesday, which was being taped for an NBC special that will air in December. Slay, she did. Raven-Symoné and designer Prabal Gurung were also two of the #blessed attendees who posted photos and videos of the angelic performer, and based on these alone we know it's going to be a powerhouse special.