season 20 champion!After a season of show-stopping performances from all across the musical spectrum, the 19-year-old Philadelphia native won the singing competition title on Tuesday night, and when ET's Cassie DiLaura caught up with Cam and his coach, Blake Shelton, after the big win, they were just trying to soak it all in.«It has not registered yet,» Cam admitted. «This is definitely a big moment in my life. It's a turning point.