But the shock twist at the end of the night was that on top of the Judges' wild card, there would be a second wild card chosen by YOU!
This place could go to Henry Gallagher, Revelation Avenue, IMD, Boyband or Jesse-Jane McParland.
Who will it be?
You'll have to tune in to the final on ITV, Sunday, 7.30pm to find out!
Beat Brothers kicked Friday's semi-final off in fabulous style with an dynamic tap dance routine.
"You brought tap bang up to date, and you made it sexy," said David.
"I'm not crazy about his kind of act," said Simon, "but the difference between your first audition and that was chalk and cheese - that was incredible!"
Chloe Louise Crawford's theatrical magic act drew gasps of admiration and amazement from the astonished crowd.
"You are sensational! I think you have fantastic stage presence.... but I wasn't blown away," said Alesha.
Amanda agreed with Alesha, but Simon and David leapt to Chloe's defence.
"Well I'm sorry - she just flew in mid air! I'm just surprised Squidly and Didley here didn't like you," said Simon.
He added: "You don't see many female magicians and it was a fantastic show!"
Peter Lambert was VERY excited to be on the BGT stage, and his death-defying performance certainly had the BGT crowd entertained.
"Well you looked like you were loving what was going on! I think what I love most is your enthusiasm - you kind of remind me of Stephen Mulhern," said Alesha.
"What I love about you Peter is you're a complete nutter! I personally loved the ladder wobbling, and it couldn't have gone on long enough," said David.
Disney girl group Misstasia brought some princess magic to the BGT stage with their oh-so-pretty rendition of Let It Go from Frozen. Even Simon thawed a little...
"It's a great idea this girls... some of the vocals were a bit off at times, but it actually made me happy! It was a perfect song choice. Well done," he Simon.
"I jut think this is perfect, and I think there are so many mummy's and daddy's out there who would buy an album. I think this could really go far," added Amanda.
Jonathan Lutwyche totally owned the BGT stage on Friday night, and his powerful performance earned him a well-earned standing ovation.
"With seen lot of dancers this week, but I haven't seen anyone dance with the passion, emotion, and commitment you did - you deserve to be in the final on Sunday," gushed David.
"What can I say," said Simon. "It was absolutely stunning! I wish we could score you 'cos I would actually give you a 10 for that."
Emma Jones' haunting vocals bagged the operatic singer a rapturous applause from the audience following her rousing performance on Friday night.
"That ended way to soon, I was really enjoying that - I was totally lost in your performance," said Alesha, while Amanda said she gave a solid performance.
"I think it was a lot better than solid," said Simon. "It was fantastic! I remember your first audition and you were shaking holding the microphone. This was so the different... and you sang it beautifully. I hope the public get behind you," said Simon.
Danny Posthill had the everyone in stitches with his spot-on impressions - including our Ant and Dec - during his hilarious semi-final performance - bagging himself a spot in Sunday's final.
"I just think you're incredible, you're very current and fresh. A lot of impressionists seem very bland, but you've got a brilliant personality underneath," said Amanda.
"It was absolutely brilliant from start to finish - and the material was top-notch. We need some comedy in the final, and you deserve to be there on Sunday.
Jesse-Jane McParland put on a FIERCE samurai-inspired performance on Friday night, earning a standing ovation from the, erm terrified crowd!
"It was like watching a Bruce Lee movie, except with a little girl. It's so original, and so different," said David.
"You are remarkable," added Alesha. " I love that passion and aggression. You're not a princess, you are a warrior!"
Simon's golden buzzer act Calum Scott closed Friday's show with a sensational version of Jermaine Stewart's We Don't Have To Take Our Clothes Off.
"That was fantastic," said Simon. "You know what I love about you, you take risks. To do that song in that style when you've got one shot in a live semi-final... I feel very proud, very happy, and actually quite smug right now!"
" I have to doff my proverbial cap to you," David said to Simon. " I think you've found someone who could have worldwide success."