This is what Simon Cowell, Piers Morgan and Amanda Holden had to say:
Piers: "I thought that was a different league altogether. Brilliantly thought-out routine. I loved the outfit, loved the choreography. I loved the smiles on all your faces. You're one of the happiest troupes I've ever seen! I think it showed that you've gone away from that audition and you've rehearsed and rehearsed and rehearsed! Great, loved it!"
Amanda: "Yeah, it was really animated, really colourful. I kind of disagreed with what Simon said in the audition. Because there's such a lot of you, it actually works better for me because then you've got a clearer picture of how good you are. So I loved that aspect of the dance tonight and I thought you did really well!"
Simon: "I'll be honest with you and stand by what I said at the first audition! I think tonight the whole thing was totally mad, but I'll also be honest with you and tell you I thought it was totally brilliant."
Piers: "Well Neil, I couldn't help but notice in today's newspapers that if Simon criticised your performance tonight, you and your mates were going to 'strangle' him to death. What I would like to do is ask Simon to go first."
Simon: "OK, I will, and if you think that kind of threat will make any difference to me, Piers, I'm just going to say, based on that, you were absolutely fantastic. Kidding aside, this is the first time I've seen you. Frank Sinatra is my favourite artist in the world. What you've got to have if you're going to do Frank Sinatra is you've got to have believability, you've got to be cool, and you've got to have swagger. You haven't got the best voice in the world, but there's something about you that makes it special, and I'm really happy you did fantastically well tonight."
Amanda: "I have to say that I was incredibly nervous for you, because I know this is about the second time in your whole life you've sung. What I love about you is that you've got this massive, tough exterior, but really you're this soft, little mushy thing inside, a bit like Simon! But you made it count, you sang well, you sang really confidently. You've got sex appeal, in a really wrong way."
Piers: "Well, I think Simon hit the nail on the head. To do Sinatra you've got to swagger, and you've got this way about you. When you're singing, you look like you are Frank Sinatra."
Piers: "Although you weren't the best technical dancers and you weren't completely in sync, given what you were wearing I don't care. I thought it was very sexy. It was fun. We haven't seen an act like this. You're not trying to be anyone you're not, and it was entertaining."
Amanda: "I think I've always said there's a room for a sort of 'Hot Gossip' girl dance group back now. You're so sexy and sassy but in a way that isn't threatening to women. You're very Sex And The City, and it comes across on stage."
Simon: "Er, girls, if you want my honest opinion, I think you got all this wrong tonight. I didn't like the outfits, girls are going to hate you. It was very 'cabaret', wasn't cool and needed to work. It had to be like the dancing version of the Spice Girls, and I was really disappointed, and didn't like the choreography. I thought you missed the opportunity."
Piers: "Yeah, guys, I mean I've thought for quite a while you could be dark horses in this competition if you could do a great semi-final performance because I saw something in the audition which reminded me of a very, very young Take That, Boyzone, Westlife. I think the way you've come on since that audition has been terrific. It wasn't perfect, you missed a few notes and some of the solos weren't great. But when you came together tonight, I thought it was knockout, and I think you have great promise."
Amanda: "I think it was very clear to you that we had a big argument with Simon in the auditions because he kept saying he was worried that you were covering the paths. But I honestly think you're showing us the future this evening. As Piers said, you're voices all came together well, it's great you do have that kind of friendship connection, you're stylings are much better. Have you ditched your mums this evening? Honestly, I just think kerching! Do you Simon?"
Simon: "Well, you know I think back to that first audition and I think everything I said that day, even though it didn't go down particularly well when I told, I think everything I said is right, which was it did feel like a bunch of guys being put together by their mums and their mums had made all the decisions, which is completely wrong. So tonight I was worried that you would come back tonight singing a Boyzone song. But I've got to tell you guys, this is chalk and cheese from what I saw before. I think you've got a real shot now."
Piers: "This is hard because I really like you and you are a great character. But the problem is exactly what we thought it might be, is that once we know the surprise and you're not actually 'mad Ken the Armenian' but 'Ken from North London pretending to be a mad Armenian', it's not as funny. The great thing in the audition was it was a great twist, and we fell about laughing. But tonight it became a rather cheesy karaoke thing. Sorry."
Amanda: "I don't think it deserved a buzz, Kev, but I do feel disappointed. I think you are a brilliant pianist. I'm not quite sure what the whole thing was supposed to be this evening. It was clearer in your audition. I loved the Elton John stuff. I loved the impressions. I think you have great charm, but I do feel tonight was a bit of a disappointment."
Simon: "Unfortunately what I said was right. It was a one-trick pony act. And I really feel for you Kev because, as you said, you've waited all of your life to have this opportunity. And the act was so corny and so painful to listen to, and that's the truth. In the real world, no-one would listen to that."
Piers: "Michael Snr, let me explain the reality here. As a father of three sons myself, I would like nothing better than to join them on the dancefloor like you just did. The problem is, if I did, they would call security and say, 'Get my embarrassing father off the dancefloor!' I liked it the first time, because I thought it was a comedy act. I thought you were being funny. But now I know it's serious, it's become embarrassing for the dad."
Amanda: "I think [Piers], you're phrasing it wrong. Because what it is, and it's dead honest, Michael Snr I honestly was worried you weren't going to get off your knees. You're tired now, you're tired my darling! You needed some somatogen this evening. I'm saying that, for the first time tonight, you looked tired tonight and your son stole the show."
Simon: "Look, I think it's ridiculous saying you don't like the father at this stage because that's who we put through in the first place. I just thought the routine was a bit mad if you want my honest opinion, you didn't make the best use of the music. It was like Michael Jackson's Greatest Hits in a minute, and it was too crazy! It just wasn't a very good routine."
Piers: "Well, what do you say. I was watching your dog, I was seeing great footwork, amazing balance and incredible natural talent, and I was thinking Chandi is the canine version of Wayne Rooney. And just like Mr Rooney, after that, I think Chandi has a very good chance of winning a very big competition."
Amanda: "Honestly, it was fantastic. It's so silly, I can feel myself welling up just because of the affection I can see between you. She is a natural showbiz dog. She's going to be up there with all the greats. She'll be up there with Snorbitz, Lassie and Scooby-Doo."
Simon: "I love her! And what's interesting is in defence of Chandi, a lot of people said she changed because of all the success. I've seen Chandi backstage and she is absolutely adorable. What I would like to see though is, would she do the ballet thing again in the final? No, you know what it just shows you [is] how important it is to love a dog because the dog will love you back, and the fact that dog was in a rescue pound and you see her now is fantastic. She's adorable."
Piers: "You definitely left me feeling quite GaGa. There were definitely some issues with the singing, and definitely with the keyboard playing. But in terms of a production, and the amount of effort you put into that outfit, and the amount of sheer passion you bring to this, I've got to support you."
Amanda: "I'm going to judge you from your audition to now, and I think there's been an improvement. As Piers said, the production was fantastic and [I'm] loving the costume. I think the dancing had improved, there were a a few tuning issues with the voice. But I quite like the story from Lady GaGa to Max Oliver.
Simon: "I'm literally going to leave the studio and go home because I thought yesterday was surreal, but watching you with those two fried eggs on your chest playing the piano. I don't know what to say anymore."