As the only female mentor on The Voice, Christina Aguilera has to put up with a lot from Blake Shelton, 35, Adam Levine, 32, and Cee Lo Green, 37.
"You have to be a pretty strong girl to stay up in the mix with the guys," Aguilera, 31, tells the new issue of Rolling Stone (on stands February 3). "It's a lot. It's a crazy locker-room kind of situation."
Maroon 5's Levine admits he sometimes treats Aguilera like one of the guys. "I honestly just recently started realizing that [she's] surrounded by three dudes all the time, and that has to be something of a pain in the ass," he says. "[But] we stopped farting in front of her!"
The four musicians have become unlikely friends thanks to the NBC hit, which returns after Super Bowl XLVI Sunday. "Just look at the four of us," Levine says. "It's just so wrong and so amazing."
"Blake can say anything or do anything," Levine explains. "If I was like, 'I'm drunk at 4:00!' I'd be attacked. He's like, 'It's cool, f-ck you, I just shot a f-cking moose, kiss my ass!' He can say whatever he wants."
As for Green? "He can wear white socks with sandals and still have it be f-cking cool," Levine tells Rolling Stone. "If I did that, Blake would make fun of me."
To read the rest of The Voice cover story, pick up the new issue of Rolling Stone, on stands and in Rolling Stone All Access February 3.