New York, July 15 : Singer Jessica Simpson called off her Barbie-themed party to celebrate her 29th birthday because she had just split up with boyfriend Tony Romo.

The Dallas Cowboys quarterback is said to have been the one who initiated the break-up.

"Jess was too heartbroken to have a big bash," the New York Daily News quoted a pal of hers as saying.

"She knows that she and Tony are broken up for good," the pal said.

Friends of the singer were not made aware of the break-up and subsequent party cancellation until the afternoon of her big day.

"Jessica was ready to settle down, and Tony was not," a second source said.

"He travels a lot for his games, and having a full-time girlfriend is a big commitment," the source stated. (ANI)