Until last night. She performed 'Beautiful' onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center in Mountain View, California.
Wow. Look at that. Xtina's weight loss game is amazing, and she looks stunning. Very 'Back To Basics,' in fact. I love it. There is simply no sign that she gave birth just THREE months ago. Werk.
Check out her performance of 'Beautiful' below!