After a week of weight scrutiny for Jessica Simpson, her beau, Tony Romo, has joined her on tour for some special support. "He thinks Jessica looks hot and has an amazing body," an insider tells In Touch. "He is there to just be a good boyfriend." The sexy singer, who’s currently on tour with Rascal Flatts, is due to perform tonight in Grand Rapids, Mich., where Tony will be cheering in the crowd. "They are having a blast and he can't wait to see her perform," adds the insider.

After flaunting a fuller figure at a concert in Pembroke Pines, Fla., on January 25, Jessica's body has been the topic of talk all around the country. But Tony, 28, isn't worried about how Jessica, 28, is handling the stress. "She's a strong girl and has great self-confidence," says the pal. The couple has also laughed off recent rumors of Tony's cheating during a party at Jessica’s house. "They think all the rumors of Tony cheating are silly!"