SINGER Fergie has spoken out to defend Christina Aguilera after the pop diva flubbed two words to the National Anthem during Sunday night’s Super Bowl.

“You know what? It’s such a huge venue, your nerves take a hold of you,” said the Black Eyed Peas star.

“I completely understand. She’s one of the best singers of our time. Nobody can take that away from you… But you get nervous at these things. We’re human.”

Fergie says, there were problems with her half-time show performance, too.

“Some of my notes were pitchy to me,” she admitted.

“It was so exhilarating. The whole thing. it was so big. That’s a once-in-a-lifetime thing.”