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."

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