Confirmed by The Sun and one of her backing singers.

:yawn:

Love Kelly, excited to see this

Hopefully she performs 'People Like Us' and not 'Catch My Breath'. :yawn:

Wonder if it might be a little medley seeing as she's plugging a Greatest Hits?

it might b since she did that recently at the AMAs!

OMG though, this is the best news ever!! I absolutely love her! total girl crush!

EEEEEEEEEEEEEE!
So excited.

My fave <3

I just freaked out! I CAN'T WAIT

She is a great singer tbd

Have to say this is the one and only Superstar that these reality show formats have unearthed.

Cool, love Kelly. I may have to watch after all.

She should do a shoutout at American Idol with her audition number like on the AMA's .

Where's the link from this plz?

Not likely to perform My Life Would Suck Without You but I can live in hope!

She might do a medley since she's promoting her Greatest Hits album. Most likely it'll be Miss Independent/Since U Been Gone/Stronger/Catch My Breath (like the AMA's).

Kelly, along with Daughtry, Carrie Underwood, Will Young, Girls Aloud, Leona Lewis and Alexandra Burke has been one of the biggest successes. To last at least 10 years in the industry is some achievement. Great producers, great songwriters as well.

She is a terrific singer and is one of the few guest performers I will actually look forward to seeing, along with the legend Rod Stewart last week.

But in fairness Kelly is really the only one consistently popular as an international star. The others have not had that international success - Alex Burke/Will Young/Girls Aloud have not been successful outside the UK and Leona Lewis has only had 1 international hit.

Forgot to add One Direction...

They have a long way to go, about another 8 years and more than a couple of hit records. At the moment they are just a teenie fad.

Appropriate considering she's pretty much the definitive reality tv singing competition success story. Plus I love her

They remind me of the Nsync, BSB days hysteria but not sure if they will have this kind of international relevance 8 years from now.

i just got all excited again for this show tbh i f`kin LOVE Kelly i can not wait i imagine she`ll do a medley tbh

She is hit and miss live though,rarely manages the high notes.