As we know, there have been group performances mainly every week since 2009. Which is your favourite so far?

2009
Week 1 - I Gotta Feeling
Week 2 - Queen of the Night
Week 3 - Fascination
Week 4 - Walk This Way
Week 5 - Hot n Cold
Week 6 - Bohemian Rhapsody and You Are Not Alone
Week 7 - Wake Me Up Before You Go-Go
Week 8 - I Don't Feel Like Dancin'
Week 9 - Wanna Be Starting Something/Don't Stop the Music
Final - Never Forget (all 12 finalists)

2010
Week 1 - Rhythm of the Night
Week 2 - Telephone
Week 3 - Forget You
Week 4 - Livin' on a Prayer
Week 5 - So What
Week 6 - Can't Stop Moving
Week 7 - Heroes
Week 10 - I Gotta Feeling (all 16 finalists)
Week 10 - Never Forget (3 finalists, with Take That)

2011
Week 2 - Hello
Week 4 - Bright Lights Bigger City
Week 5 - Price Tag
Week 6 - Walking on Sunshine
Week 7 - When You're Gone
Week 8 - Wishing on a Star
Week 9 - Hold On
Week 10 - Greatest Day & We Found Love/Party Rock Anthem/On the Floor/Moves Like Jagger/The Edge of Glory (all finalists except Frankie)

2011 Hello Johnny's post box moment did it for me

Rhythm of the Night, Forget You and Telephone.

2010's where the best imo. Telephone & Forget you are my favourites.

Very much this. It's the only moment I can really remember.

+1.

2010 - Telephone, Can't Stop Moving and I Got A Feeling

2011 - Bright Light City Lights, Walking On Sunshine and Hold On.

I can't remember any from 2009!

2009's group performances were pretty hilarious.

2010 What A Feeling! Cher Lloyd's rap was everything.

2010 Telephone What A Feeling Forget You
2011 Hello

I Got A Feeling was in 2009, the first one that they ever did and it wasn't mimed, surely you must remember that

I remember Forget You and Telephone were really good!

Made a mistake. In 2010's final it was 'What a Feeling', not I Gotta Feeling

Any of the 2010 Group Mimes, with the exception of Living On A Prayer. They were fun, and watching the background during them was normally just as hilarious as watching the performance. In one, Wagner is coming front of stage, and John goes to give him a high five and Wagner just blanks him. Watching Matt and Aiden trying not to laugh, and in one the boys helping the girls down the stairs in the most ungallant way possible. They get them to the bottom of the stairs and just abandon them.

Johnny's exuberant "HELLO!!" is pretty funny, but for enjoyment it has to be 2010.

When You're Gone with Bryan Adams from last year. (Though I preferred it before he joined in)

I loved watching Matt and Aiden during the 2010 group numbers. They always looked like they were on the verge of bursting into hysterical giggles throughout. Telephone and Forget You were definitely my favourite ever performances. They just all looked like they were having fun.

With these I think!

"Fascination" from 2009, purely for Rachel Adedeji's disastrous tambourine throw. She almost hit the deck trying to catch it!

Oh I meant What A Feeling from 2010 sorry!

Which was the performance where the doors got stuck so the people on stage had to lipsynch to the absentees' lines? That was hilarious!

2010: Telephone and Livin' on a Prayer

2011: Hello, Walking on Sunshine, When You're Gone and Hold On

What did you think of last night's performance?

Who can forget Danyl's opening vocals to 'I Got A Feeling'

'Without You' which the contestants just did on Sunday was pretty good But Jade really messed up. Kye's vocals on 'Somebody I Used to Know' were abysmal.