Confirmed by the host tonight that Katy Perry will join One Direction in performing on the finale of X factor Australia 2013

"Can you hear that ROAR? It’s the sound of Katy Perry fans across the nation going crazy at the news that the one and only California Gurl will be making an appearance at The X Factor Grand Final!

This announcement is so huge it’s broken The Luke Jacobz Excitement Meter. And it just gets better, because the charming Miss Perry will be performing not one but TWO huge songs!

Yes, this is real life: both Katy Perry AND One Direction will be lighting up our stage during the Grand Final. We can’t wait to face the music!"

Link

The promo is unbelievable, Katy + her team are amazing.

Ugh Roar is doing so well there, she'd be dumb not to perform Unconditionally.

Is someone going to Internet this? I probably can't watch Australian X Factor on Canadian TV networks.

YAS!!

WOW! Queen K will slay.

She'll probably perform Unconditionally! YES!

That's exciting

She better do Unconditionally

Isn't Roar already in its 8th week at #1 there or something? Queen.

Oh yeah, you shouldn't worry. I'm from the US so I wouldn't be able to see it either, but I love the X Factor Australia (more so than the US). There are people that have uploaded all the performances on X Factor to their Youtube channels, including performances from the results show.

So you'll definitely see Katy's performance.

I'll be there, YAS Katy

You will definitely get to see the performance , i will update the OP once its available.

All the XF Australia videos are on youtube.

Great promo!! International promo seemes so good for Prism era!!
Cant wait for 1D & Katy