Blake Shelton's pickup truck got stuck in the mud and he jokingly told girlfriend Gwen Stefani that it was him trying to teach her oldest son, 11-year-old Kingston, how to drive! "What happened?" Stefani asks, laughing. "What did you do?""I was teaching Kingston how to drive," Shelton replies. "He just took off driving like a maniac into the middle of the frozen pond."But if you listen closely, you can hear Kingston in the background, denying it was his doing."I did not drive that in there," he explains. "No, I didn't."The truck ended up needed to be towed out of the mud by another vehicle!