Kelly Clarkson performed on ITV’s The X Factor for the first time ever this evening.

The first ever American Idol winner has previously guest mentored and performed on the Dutch version of the reality TV competition and sang on last week’s Australian live show, but has never before graced any of the UK series’.

This evening the brunette beauty took to the stage to give a live performance of her newest single “Mr. Know It All”, the lead track from her fifth album ‘Stronger.’

She emerged onstage in an unflattering gold dress, which did nothing for her curvy figure but thankfully her voice was as amazing as ever. StyleJacking thought she looked like a burst sausage hidden inside a disco ball…

We loved the marching drummers that accompanied Clarkson throughout and the song is as catchy as we have come to expect from the songstress. Kelly has been a long time hater of autotune and she didn’t need a bit of it this evening, as her vocal strength was amazing and her tuning spot on. The acapella section during the second last chorus was especially moving.

Kelly recently revealed that she doesn’t think she ever would have done well, had she entered The X Factor, as she doesn’t think she is ‘captivating’ enough for the controversial show, but instead reminds people of their ‘cousin’ next door.

We can’t help but wonder if Sami Brookes managed to catch some time with Kelly backstage, as earlier this week she admitted that she was beside herself with excitement about meeting her idol and is dying to duet with the star.

Did you enjoy Kelly’s performance tonight? What did you think of “Mr. Know It All”? Leave your comments below and download the song by following the link.