Simpson Chokes During Performance

First Clay, now Jessica? Jessica Simpson was photographed arriving at the Kennedy Center Honors in D.C on Sunday to help pay tribute to Dolly Parton.

Later on in the evening, she took the stage with Carrie Underwood to perform Dolly Parton's hit "9 to 5" but Jessica ended her performance abruptly with the words "So Nervous" and quickly exited the stage. The stunned audience remained silent, giving her no applause. She was said to be crying later on in the evening when her and the other performers returned to the stage.

On a side note, what do you guys think of her dress? At first glance I loved it, but it's way too tight in the chest area, she looks like she's about to pop...I do love the dress, if it was the right size.