John, from coach Will.i.am's team, was knocked out during Saturday night's programme after losing out in the public vote.
Into The Ark, Mo, and Jamie will now battle it out for the chance to get their hands on a life changing record deal with Polydor Records.
Moments earlier, Sir Tom had been heard saying "f*** me" as it was announced that his act, Into The Ark, had made it through to the final stage of the ITV competition.
Host Emma Willis quickly took to the stage to apologize, telling viewers: "There may have been a little swear word that popped out then through excitement- apologies to anybody if they were offended".
And what about Gavin Rossdale, Will.i.am and Sir Tom Jones?
"An awesome thank you to the most phenomenal person I have ever met, thank you Jennifer", he said.
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Jennifer's second act Mo took his turn last, taking on Iron Sky by Paolo Nutini.
On tonight's final (April 2), the contestants each performed their favourite song from the series.
Sir Tom said his act - also known as Taylor Jones and Dane Lloyd - had been "tremendous".
BLACKWOOD duo Into The Ark have finished as runners-up in the The Voice final.
"The Voice" continues tonight (Sunday 2 April), when the first ever ITV victor will be picked.
This year's series will not have an official winner's single, instead, they will immediately begin working on an EP, to be released a matter of weeks after Sunday's final.
It has been confirmed that the victor will not release a Winner's Single this year.