Jessica Simpson and Tony Romo Split Up

Jessica Simpson was dumped the day before her birthday, reports PEOPLE magazine. The pop turned country singer is said to be "heartbroken" over the end of her almost two-year relationship with Dallas Cowboys quarterback Tony Romo. The two reportedly broke up Thursday, the day before Jessica's 29th birthday.

"She loves Tony," a source tells PEOPLE. "But it's been difficult lately. He's busy with his career and she's getting ready to shoot her show ('The Price of Beauty'). They decided to part ways."

Jessica had planned to throw a Barbie and Ken themed party for her birthday, but it was apparently canceled in the wake of the breakup. Still, the newly single singer seems to be keeping her chin up.

"Barbie party didn't happen," Jessica writes on her Twitter page. "But I turned 29 and feel like i am on top of the world yelling I LOVE GETTING OLDER!"