Let's say that both Xtina and Beyonce were nominated in the same category for a huge awards show ceremony. And Xtina won - but Kanye had other plans....
Xtina is known to not hold back sometimes with her shade, comments, or actions
- which is why the question comes into place:
Xtina used to be good at being shady. She would probably take the mic back and just continue thanking making sure she thanks her many fans and MTV for choosing her as the winner.