American Idol judge and country star Luke Bryan left a fan shocked in Tennessee after he helped her to change a tire on her car.MORE: Meet the American Idol judges' children: Katy Perry, Luke Bryan and Lionel RichieIn a TikTok video which has now gone viral, Courtney Potts caught the moment that the 45-year-old singer stopped to help her change the flat tire.WATCH: Chayce Beckham wins American Idol 2021"When my tire blew in small town Tennessee, who stopped to help? Luke Bryan! He deserved all