Nothing can beat beyonce/alexandra imo

but i actually really loved jahmenes/nicoles duet, even though she snatched the mic lol, it was still great.

worst duet for me is rebecca and xtina, rebecca looked like a deer caught in the headlights.

another awful performance was matt cardle and rihanna, rihanna was good, but matt cardle looked awful and was tryna to act sexy, but he could never pull that off in a million years!!

The best duet for me was either Tulisa/Little Mix or Rihanna/Matt Cardle and the worst Christina/Rebecca because Christina blew her out of the water.

Even though the Beyonce/Alexandra duet was great, Imo it is overrated.

Best: Alexandra & Beyonce - I just couldn't believe my eyes, 1 they managed to get THE QUEEN B, 2 they both sounded AMAZING and 3 you could really see how much Alex admired Beyonce.

My Personal Fave: Tulisa & Little Mix - Tulisa got to show off her voice and she got to sing with her muffins and Jesy beatboxed and it was so great.

Worst: Probably Cher Lloyd & Will.I.Am - I'm the BIGGEST CL fan and I really like Will but but it was a bit of a mess, Will.I.Am was god awful.

It is still regarded as the hottest duet ever - and nothing last night came anywhere near that. You need 2 people to make it hot - it's called chemistry - otherwise it doesn't work.

Favourites for me:

Matt & Rihanna
Alex & Beyonce
Jahmene & Nicole - but mainly because the mic trouble just made it seem cuter than maybe it would otherwise have been.

Oh yes, I forgot about that. It really was terrible.

Cher and Will.I.Am was a dreadful performance. So flat and awkward.

Kelly rowland and Amelia lily was superb

Catherine Jenkins and Rhydian together was dreadful - maybe it was the microphones, but she completely drowned him out.

One of the best was the one with George Michael, though I have completely forgotten who he sang with.

Best: Cher Lloyd & Will.I.Am.
Worst: Amelia Lily & Kelly Rowland.

Best by an absolute mile and a million is Alexandra & Beyoncé.

Matt & Rihanna and Leona & Take That also get mentions from me.

Worst for me has to be Rebecca & Christina, not because of Rebecca but because Christina was quite rude and sang over her and showed off. I felt bad for Rebecca.

Leona and Take That we're awesome! So classic and her voice was phenomenal and amazing how she blended in with take that! Especially that high note towards the end just added in effortlessly!

Worst: Cher and Will or Kelly and Amelia

Best: 1. Alexandra and Beyonce
2. Amelia and Kelly Rowland
3. Matt and Rihanna

Worst: Cher Lloyd and Will.

George sang with little Geordie Joe It was a nice duet

I also quite liked Leon and Kylie, think it won it for him, Marcus and Gary (although that was mostly the song), Rebeccas was good too as was Stacy's and there's one other I can't remember now :/

Best: Beyonce and Alexandra, Matt and Rihanna, Little Mix and Tulisa

Worst: Eggnog and Boyzone, Marcus and Gary, Chris and Gary.

BEST: Alexandra and Beyonce (crying aside, it was good), Jahmene/James and Nicole, Little Mix and Tulisa

WORST: all duets of series 7 (except possibly 1D/Robbie, which was only moderately awful), Christopher and Gary

Best: Beyonce and Alexandra Burke (never be able to beat it)

Worst: Christina and Rebecca Ferguson (christina had no time for her came off very rude and up herself)

I think Matt & Rihanna/Cher & will.i.am from 2010 and Tulisa & Little Mix from 2011 as the best with Rebecca/Christina from 2010 and Gary/Christopher from 2012 as the worst.

Favourite: Ray with Westlife 'That's Life'

Worst Eoghan/Boyzone and Cher/Will.i.am

Best: Leona Lewis & Take That, Alexandra Burke & Beyonce
Worst: Jason Donovan & Same Difference, Eoghan & Boyzone

Best would be Alex and Beyonce no question, utterly amazing. I also loved Tulisa and Little Mix, Kelly and Amelia, Nicole and James, Stacey and Michael Buble, Rebecca and Christina Aguilera and Matt and Rihanna.

Worst would easily be Eoghan and Boyzone. Gary and Chris was pretty awful too as was Leon and Kylie Minogue.

Just listened to George and Joe again.That was the best, great stuff. I wish they would have more classic artists on the X Factor
Also liked Matt and Rihanna
Worst was Rebecca and Christina - just cringeworthy stuff. Hated Robbie and Olly, just too cocky and jack the lad for the song they were singing

my favourite is probably jahmene and nicole, think it the mic mishap made it, as it was more spontaneous
least favourite is probably eoghan and boyzone or olly and robbie

It's so funny how we've gone from brilliance like Joe/George Michael and Alexandra/Beyoncé to simply wheeling on the judges.

Best: 1D and Robbie, Joe and George, Amelia and Kelly, Jahmene and Nic, Matt and RiRi

Worst: Gary and Fixtopher, Cher and Will.i.am, Eggnog and Boyzone and JLS and Westlife

Best: 1. Tulisa and little mix
2. Stacey and michael buble

Worst: christopher and gary