He is no stranger to judging up-and-coming singers, thanks to his lengthy stint on The X Factor and his current coaching role on The Voice.
But Guy Sebastian left viewers of The Voice confused during Tuesday's episode when he failed to mention he already knew contestant Vendulka Wichta.
Vendulka had auditioned in front of Guy on The X Factor in 2012, prompting fans to speculate that she'd been snubbed after he didn't seem to recognise her.

Awkward! Guy Sebastian left viewers of The Voice confused on Tuesday when he failed to mention he already knew former X Factor contestant Vendulka Wichta at her audition
Guy had turned his chair for Vendulka's quirky rendition of the Culture Club's Karma Chameleon and fought over the singer with Boy George and Delta Goodrem.
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Share 11 sharesHe praised her for being musically creative and 'flipping the song' entirely, but Guy didn't address the fact that the two have met face-to-face before.
'Vendulka, I love that you're taking risks because that's what this show is about,' he said, before adding: 'I think you and I can make some beautiful music together.'

Success: Guy had turned his chair for Vendulka's quirky rendition of the Culture Club's Karma Chameleon and fought over the singer with Boy George and Delta Goodrem

Familiar face? Vendulka auditioned for The X Factor in 2012, when she was just 14 years old
Viewers were quick to call Guy out on Twitter, with one fan commenting: 'Vendulka was great but awkward that Guy didn't mention he knew her?'
Another said: 'Why is @GuySebastian not mentioning he knows Vendulka from #Xfactor?'
A third viewer questioned: 'Does Guy remember Vendulka from X Factor?'




'Does Guy remember Vendulka?' Fans rushed to Twitter to call out Guy, and questioned why he never mentioned he knew Vendulka from The X Factor

Ring a bell? Guy had been a judge on The X Factor at the time of Vendulka's audition, alongside Mel B, Ronan Keating and Natalie Bassingthwaighte
Vendulka auditioned for The X Factor back in 2012, when she was just 14 years old.
She impressed the panel, made up of Guy, Ronan Keating, Mel B and Natalie Bassingthwaighte, at her first audition and made it all the way to the Judges' Houses before being eliminated.
Hoping for her second shot at musical success, Vendulka sailed through her blind audition on The Voice, choosing Boy George as her coach.

Bizarre: Guy praised Vendulka's musically creative blind audition on The Voice, but didn't address the fact that the two have come face-to-face before

He's a fan! Guy told Vendulka, ' I love that you're taking risks because that's what this show is about. I think you and I can make some beautiful music together'
Boy George, who was the lead singer of Culture Club, was left so impressed with Vendulka's version of his track that he jumped up on stage to sing with her.
He told her: 'What you just did I didn't think was possible. I was like, "Hold on a second, what is she singing?" You gave it a lovely blues flavour and soul.'
The Voice airs Sunday 7pm and Monday and Tuesday at 7.30pm on Channel Nine

Her choice: Boy George, the lead singer of Culture Club, was left so impressed with Vendulka's version of his track that he jumped on stage to sing with her, before she chose him as a coach
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