Carrie Underwood isn’t afraid of her new gig on American Idol ruining her marriage. According to insiders, the country singer, 41, couldn’t be more excited about becoming a judge on the ABC singing competition and feels confident her husband, Mike Fisher, will be fine to hold down the fort at home with their two sons while she’s filming in Los Angeles. “Carrie swears they can handle the long distance,” the source explained of the couple, who wed in 2010. “Their friends worry about how they’re going to keep it together.” The pair currently have their primary residence in Nashville, where their …
