Video: Christina Aguilera falls on stage at Grammys

Poor Christina Aguilera, first she gets the words to the American National Anthem wrong, at the Super Bowl of all places, and then she stacks it on stage at the Grammys.

HollywoodLife.com spoke to a source in Christina’s camp who says she had a simple case of the the stilettos.

“Christina’s shoe got caught on the back of her dress,” the source said. “It’s as simple as that.”

The singer, who has a three-year-old called Max with Jordan Bratman, recently said that having her son was her proudest moment of her life.

“My proudest moment was when I gave birth to my son — I always say Max is my greatest song,” she told Cosmopolitan magazine.

Check out the video of Christina falling below.