Jessica Simpson has denied Carrie Underwood’s claims that her man Tony Romo has been calling up his ex.

The Dukes of Hazzard star says that Tony hasn't been secretly contacting Carrie - who he dated in 2007 - and the pair are still deeply in love.

How does she know this?

"I looked at his call log," she admitted in a interview on U.S. radio station 107.5 FM.

Carrie had claimed, "The phone will ring and it'll be him, and I'll maybe not answer."

"Tony and I both laughed at that," Jessica said. "We got a chuckle out of it."

"If Tony wanted to call her and be with her, he would."

"He appreciates my talent," she added. "He's the first person I've spiritually connected with.”