Kelly Clarkson is no stranger to speaking out, and she has been honest about a variety of topics, such as her career, her body and her divorce. She is not one to hold back. However, there are certainly times when she may have gone a bit too far with being honest.

Kelly Clarkson just admitted that a celebrity who went on to become a coach on 'The Voice' was once very 'mean' to her. Here's who fans think it must be.

Kelly Clarkson may have found success with American Idol, but she didn't know it was a TV show when she first auditioned.