Ariana Grande, Pharrell, Mary J. Blige, Sam Smith and Tim McGraw performed their hits and shared their favorite holiday and Grammy memories.

Grande kicked off A Very GRAMMY Christmas with her new holiday single, "Santa Tell Me." Wearing all-white, Grande's performance of her new single "Santa Tell Me" had her playing the role of head elf, making sure everything is going right in Santa's workshop. But Grande may have been slacking since it seemed like those little helpers of Santa's were doing more dancing than toy-making.

Later, she returned to the stage for her new single "Best Mistake" featuring her boyfriend Big Sean who was doing his best James Bond impression in a nice looking tux.

The two didn't try to hide their love away, standing close, staring into each other's eyes and eventually walking off the stage hand in hand. Grande said that she gets "a little giggly" doing that song because it's "such a serious song, and to see him act so seriously makes me laugh."