"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."
So is Shelton really that drunk all the time? His mom says no.
"He likes to make people think he's drunk, but I've never seen that boy drunk in my life," she told the mag.
Levine, whose probably used to the gentle ribbing, had kind words for his fellow "Voice" judge.
"The guy is just pure positive energy," Levine said.
"He has this kind of punk-rock mentality, where he's not afraid to speak his mind, not afraid to say the wrong thing. It's a huge part of his success: What you get is different than what you're expecting."
2014: The Year in Music [PHOTOS]