Is Jessica Simpson trying to win back her ex husband Nick Lachey? A report from OK! Magazine claims that the buxom blonde still has her ex on speed dial. In his first-ever sit-down interview with girlfriend Vanessa Minnillo in OK’s July 16 issue, Nick revealed that he is no longer in contact with jessica and he believed that was best for both of them. “It’s good to move on,” he told OK. “I think I’ve done that.” But jessica? Not so much. A well-placed source close to the Dukes of Hazzard star tells OK, “She’s been calling Nick all the time – at one point he had to change his telephone number. She now can’t contact him even if she wants to.”

And that is exactly what she wants, especially after seeing the Nick and Vanessa hot tub photos that recently showed up on the Internet. But winning back the man she once called her “best friend” isn’t going to be easy and is more complicated now that Nick has fallen in love with former MTV host Vanessa, 26.

Still, Jessica seems determined to try. A friend of Jess tells OK, “She wants to be the girl that Nick fell in love with again.” Indeed, Jessica’s body is back to the same size it was when she fell in love with the singer, and her hair has returned to the golden-blonde shade she sported when they were together.

Now, a source close to the Texas native tells OK that Jessica is trying to find just the perfect opportunity to bump into her ex-husband in Los Angeles. But stealing his heart back could prove difficult. As Nick told OK, “What Vanessa and I have is real. It’s ours. Nobody can touch that.” Including his ex-wife.