The 'Beautiful Monster' singer will serve as a mentor on Cee Lo Green's team in the second season, which currently airs Monday nights on NBC.
Speaking to social media correspondent Christina Milian, he said: "What I dig about The Voice is that, okay, it's a singing competition, but it is a singing competition that focuses on the important stuff, which is talent."
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He added: "It's not about what the person looks like or marketability and all that silly stuff, it's about talent. Before there were music videos and the internet and all that stuff, all you had was the voice, and if you couldn't get it with that, then you couldn't get it."
Ne-Yo said that he and Cee Lo had been hoping to work together for a while, describing the 'Forget You' singer as "the artist's artist".
"He's one of those cats that will do whatever he wants to do and you'll either love it or might not understand it, but it doesn't matter because it's Cee Lo at the end of the day."
As for how he approached his mentoring role, he said: "I feel like everybody needs different advice. You can't textbook what it is you're supposed to say to somebody. Some people may need to dial back, some people may need to speak up."
Other guest mentors this season include: Kelly Clarkson, Lionel Richie, Babyface, Miranda Lambert, Alanis Morissette, Robin Thicke and Jewel.
The Voice airs Mondays at 8/7c on NBC.
Watch Ne-Yo talking about The Voice and his upcoming fifth album below: