Kelly Clarkson - Mr. Know It All - Jay Leno

Kelly Clarkson sang her new single 'Mr. Know It All' on the Tonight Show with Jay Leno. She's so amazing! Her new album 'Stronger' comes out on October 24.

Watch the video:

http://www.hulu.com/embed/CP6oN0zpM9gBJAAxgJL1lg