Yesterday superstar Usher was scheduled to hit the stage at the Iheart Radio Music Festival in Las Vegas , but before that he found his way in NYC to take part in the Global Citizens Festival . Usher has never been a stranger when it comes to giving back and raising awareness for special causes so it was only right that he took the time out to hit the stage. Watch as he performs his heartfelt & inspiring anthem ” Champion ” live in Central Park backed by special guest the Kenyan Boys Choir & Rubén Blades’ below.