BGT finalists decided

BGT 2012All the acts who'vemade it through

But there's one last surprise in store for viewers...

The last two acts set to perform on Saturday night's Britain's Got Talent live final have been decided.

Synchronised swimmers Aquabatique and singer Ryan O'Shaughnessy triumphed in the show's last semi-final, which aired on 10 May.

Ryan, the four swimmers and acrobat Billy George made it into the top three, with Ryan making it through from the public vote alone.

It then came down to the judges to pick the last act to go through to the final.

David Walliams went for Aquabatique, with Alesha Dixon evening up the odds and opting for Billy.

Amanda Holden echoed David's choice, going for the girls, and Simon Cowell sealed the deal by also opting for them, saying:

"Billy, you were absolutely brilliant tonight. You girls lost out on the chance to represent at the Olympics, and you were amazing this evening.

"The act that I'm going to send through to the final is Aquabatique."

The two will perform alongside the other finalists and a surprise wildcard act, which will join the acts during Saturday's final.

The overall winner will get the chance to perform in front of the Queen at this year's Royal Variety show.

Catch the BGT live final on ITV1 at 7.30pm on 12 May.