In scenes shown on Saturday night (30 January), the former pop band member performed Sia's 'Chandelier' - and all FOUR judges turned for him.
If you missed it, take our word for it - he was AWESOME... Or watch the video below!
Paloma Faith, Boy George and Ricky Wilson all wanted to coach a shocked Kevin, with will.i.am turning at the last minute as Kevin sang his last note.
When Kevin revealed his chart past to the judges afterwards, Boy George called Liberty X a "guilty pleasure".
Understandably, the judges clash over Kevin - but he eventually chooses to join Team Paloma.
The dad of two, 35, first found fame on ITV talent show Popstars, alongside Michelle Heaton, Tony Lundon, Jessica Taylor and Kelli Young. The 'runner-up band', they eventually became more successful than the winning group, Hear'Say.
Liberty X achieved 10 Top 20 singles from 2001 to 2007, and reformed in 2012 for ITV2 show, The Big Reunion.
However, it was during this time that they collectively decided it would be a short-term reunion to give their fans a final goodbye.
During Kevin's amazing audition, his former Liberty X bandmate Michelle Heaton showed her support on Twitter.
She wrote: "Whoop! Go @Kevsimmx come on peeps... Best in the @BBCTheVoiceUK of any year! #kevtowin."
Michelle then joked: "Lol .. Somehow doesn't look like @Kevsimmx needs us anymore #sadface #dumped lol."
Jessica added: "Well Kev you had me in tears there! Goosebumps! Could not be prouder of you mate you deserve it all! Love you! #TheVoiceUK @Kevsimmx."
Even coach Ricky Wilson took to Twitter to congratulate Paloma on her new team member; saying: "Well done Paloma... @Kevsimmx could win the whole thing. He's incredible and has the fight to do it."
Bookmakers William Hill have made Kevin the new 9/2 favourite to win the show, ahead of Cody Frost who is 5/1.
Do you think Kevin could win? Tell us in the comment box below!
Watch Kevin Simm perform 'Chandelier' on The Voice UK 2016: Blind Auditions 4:
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