Tony Romo compares Jessica Simpson to his ex-girlfriend

Tony Romo thinks ex Carrie Underwood is a better singer than his current girlfriend Jessica Simpson - and has even told her to her face.

"[Tony] really hurt Jess' feelings," says a source close to the couple. "She tried to laugh it off in Hawaii [where Tony played in the Pro Bowl], but she pouted whenever she heard Carrie's songs playing."

And Tony, 27, hasn't been overly supportive regarding Jessica's new country album either.

"Tony said he thought Jess would have trouble winning over audiences with her upcoming country CD," the pal adds to OK! magazine.

Unfortunately for the former 'Newly Weds' star, Tony is not the only one who feels that way. Rascal Flatts' frontman Gary LeVox, who has collaborated with Grammy winner Carrie, has his reservations about Jess' foray into country music.

"It is tough to be a pop artist and then make country records," he said. "Country fans get it. They go, 'You're not country -- you're a pop artist.' The fans make you or break you."