Blake Shelton and Adam Levine have spent four seasons on "The Voice" making fun of each other and doing their best to mentor contestants to success on the reality singing competition. But Shelton told Men's Journal in a recent interview that the Maroon 5 frontman's healthy lifestyle is usually the source of their disagreements.
"I get frustrated with Adam because, to me, rock stars are supposed to be drunk all the time," the 37-year-old country singer said. "But he's very healthy. He takes care of himself. And it drives me crazy, because I want him to be more like me. Drunk all the time."