Kelly Clarkson has been living her best life since filing for divorce from her estranged husband Brandon Blackstock. The 39-year-old musician attended a Blake Shelton concert Friday night with friends and shared her experience online. "Get it @blakeshelton we are LIVIN’ OUR BEST LIVES!!! THANK YOU," Clarkson captioned a selfie of herself and her friends along with three red heart emojis.