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Kelly Clarkson: 'Mr. Know It All' on 'The Tonight Show'!

Kelly Clarkson: 'Mr. Know It All' on 'The Tonight Show'!

Kelly Clarkson belts her heart out on The Tonight Show with Jay Leno, filmed on Tuesday (September 20) in Burbank, Calif.

The 29-year-old singer sang her newest hit single “Mr. Know It All” in a sequined black off-the-shoulder dress in front of Jay Leno‘s live studio audience!

Be sure to look out for the music video of “Mr. Know It All,” set to hit the web on September 26.

Kelly‘s album Stronger will be released on October 24. Check out the album cover art in case you missed it!

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20 Responses to “Kelly Clarkson: 'Mr. Know It All' on 'The Tonight Show'!”

  1. 1
    Palacinko Says:

    Go Kelly!

  2. 2
    katy Says:

    Awesome performance!!! (Just Jared, this was taped Tuesday in Los Angeles)

  3. 3
    seraia Says:

    flop single

  4. 4
    zoey Says:

    Kelly sounds good, but the song is just meh.

  5. 5
    Petra Says:

    @zoey: kelly is just meh tbh

  6. 6
    alycia Says:

    Go Kelly!Another great performance. She’s my favorite singer. I CANNOT wait until October 24!!

  7. 7
    Lalalaow Says:


  8. 8
    robb Says:

    I’ll probably be more into her if she put out better music..seriously waste of a great voice singing this crap of a song.

  9. 9
    heartofhearts Says:

    moo moo

  10. 10
    kc Says:

    “Mr. Know It All” must have told Kelly to lose a few

  11. 11
    Caian Says:

    She Looks better! Sexy!

  12. 12
    BloodbuzzOhio Says:

    The lyrics are terrible!

  13. 13
    Kiley Says:

    I heard this song on the radio the other day & had no idea it was Kelly. It doesn’t sound like a strong enough song for her vocals, but it’s not that bad. I’m sure it’ll grow on me.

  14. 14
    monk Says:

    I’m sure if she might be dressed in ****** underwear with breasts on out, dancing on prostitute bar with sexual dirty gestures how are promoting now all the “singers without little bit of talent” this song would have been a huge success but she is not kind to come down at that low level with those residues… with strong voice, talent, passion and devotion for music do not get nowhere these days…. crap

  15. 15
    SarahNL Says:

    Amazing!! Love her voice, love the song. xD

  16. 16
    Dustin Says:

    kelly clarkson is so basic …

  17. 17
    BloodbuzzOhio Says:

    @monk: I’m sorry, but you’re making it seem as if she’s PJ Harvey or Fiona Apple. When it comes down to it, her music is as generic as the rest of them. At least she has a genuinely good voice, though.

  18. 18
    sassy Says:

    Kelly Clarkson is amazing live. What is wrong with you idiots? Nobody can sing like this woman. She is a God live!!!!! This song is going to be a huge hit. She has just started promoting it, and the video is not out yet. The song is great and Kelly is freaking phenominal.

  19. 19
    sassy Says:

    You are just meh! Get a life loser.

  20. 20
    lucy Says:

    Her talent is just amazing. It’s so refreshing to actually hear someone who can just sing without any help. This song is just so catchy! I LOVE it!

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