She sang "Unless It's With You" in a sexy wedding dress before having the couple come up.
With Christina’s powerful vocals, the ballad evokes comfort during a terrifying time.
Get ready for more runs than a 30-year-old pack of Hanes Her Way.
BTW, we're all going to hell.
Hayden Panettiere couldn’t do it without the Moulin Rouge! Queen.
Oh Xtina, Xtina, how were we supposed to know?