He scored two top 10 album hits with singing partner Charlotte and now Jonathan Antoine is planning to take the charts by storm, on his own.
The opera singer who is still only 19, releases his debut solo album next month.
Jack Pack wooed the audiences and impressed the Judges with their cool performances of big band classics including Frank Sinatra's That's Life and Nina Simone's Feeling Good in the live final. Now their dream's come true as they're working on a record with Simon Cowell's company.
"I love this era of music, it only works if you've got great voices and if you respect the time and Jack Pack win on both counts."
Simon continued "I've always wanted to work on this type of record so I am looking forward to us working together".
The band is made up of singers Sean Ryder Wolf, Alfie Palmer, Andrew Bourn and Martin McCafferty.
They said: "It's a dream come true for us to be signing to Syco Music. We'd like to thank Simon Cowell for believing in us and giving us this opportunity.
"We can't wait to get to work in the studio and try to repay our supporters for the faith they have shown in us."
The band will start working with the Syco Music team on their debut album which will take influences from the Rat Pack and swing music styles they are renowned for.
Their debut album is due to be released in 2015.
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Our amazing 2014 Britain’s Got Talent winners Collabro have grabbed the top spot in the UK album chart. You voted for them to win BGT and now they've conquered the charts!
She said she'd never apologise for pouring water over David's head but it looks like Alesha Dixon made a last minute u-turn.
David tweeted a handwritten message from his fellow Judge suggesting she's forgiven him for his cheeky comments.
Britain's Got Talent dominated the Twitter-sphere on Saturday with a whopping 665,119 tweets sent during the show and a peak rate of 11,244 tweets per minute.
That's some seriously fast talkin' - see what the chat was about.
Simon said: "For me this was the best Final I have ever done," and there's no denying all 11 acts gave mind-blowing performances on last night's show.
Take a look at the order in which the fabulous Finalists came in this year's competition.