Showing them how it's done

JLS and Alexandra Burke are here to do a weird mash-up of their big singles. Alex is singing live this time - so it sounds very different to the last time she performed in the guest slot. It's a very strange duet but it sort of works, in a "we figured this out in our bedroom this afternoon" kind of way.

The boys really don't have strong voices at all, but they look so happy to be pop stars with ridiculously large boots that it's hard to begrudge them their success. Alex kept thumping Aston's chest with her fist a little too vigorously, he looked like he was ready to slap her back. They're all being so nice to each other, it's quite sweet. They're hoping for even more success next year, so let's keep our fingers crossed that Pete Waterman's predictions of pan-flashery don't come true.

To remind everyone what can happen when you're genuinely incredible, here's Leona Lewis doing her epic version of Stop Crying Your Heart Out. She's spending a long time in her low register, but she's gonna rip it up in a minute, so hang onto your hat. If you're wearing a hat that is. The background VT of the girls rushing to embrace Dannii has been cropped to remove Rachel's hilarious pratfall. Shame.

Her song's finished but they're leaving her standing on the coffee table - probably just as well. She's fantastic at the singing but I think we've all heard her say "It's been amazing, thank you so much" enough to last a lifetime. Simon gave her the thumbs up, as if to say "That'll shift another 50,000". Which is his way of showing he cares.

Olly's here to sing The Climb and it sounds shaky - it doesn't help that the song is a Miley Cyrus album track, and therefore about as low as music gets. I don't think Leonard Cohen wrote this one. Simon's giving it a bit of face-palm. Is he genuinely worried or faking out the audience? Nice addition of some clanging Christmas bells deep in the mix, to remind people that they're going to be hearing this right through the festive period.