I wanna coach you more than I've ever wanted to coach another person on The Voice,' he added. Kelly Clarkson seemed stunned that he was not 'already on the radio' - but it was Alicia Keys who ...

Read more: Celebrities Who Were Unrecognizable 10 Years Ago There are several secrets about "The Voice" that audiences aren't supposed to know, but the behind-the-scenes reaction to Alicia Keys ...