All four judges on NBC's new hit singing competition The Voice are set to sign on for its second season later this year. In an interview with Billboard, Cee Lo Green says that it's a "safe assumption" that he, Christina Aguilera, Blake Shelton and Maroon 5 frontman Adam Levine will return to the series. "I'll be there, that's for sure," the singer said.

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Green told Billboard that while he finds working on The Voice "very gratifying," his commitment to the show – as well as his touring plans for the summer, which includes opening up for Rihanna's arena tour and playing a number of major festivals – has made it "increasingly difficult" to focus on making new music.

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