The singer, who said he'd one day like to be a judge on a talent show, insisted that the BBC One series had credibility since the coaches are real musicians.
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"The Voice was good because it was musicians judging it. With previous pop shows, you'd always hear fans moan, 'They're not musicians, so how can they judge it?'" Maynard told the Daily Star.
"But on The Voice, the judges know what the people auditioning are going through. [Judging] looks like a fun thing to do, so it's part of the plan to eventually try that sort of thing.
"I wouldn't be deliberately brutal as a judge but I'd certainly be honest."
Maynard added that he loves The Script but confessed that Voice coach Danny O'Donoghue didn't recognise him when they first met.
Jessie J and Sir Tom Jones are rumoured to have quit The Voice UK following a troubled first series.