Adam Levine loves wearing underwear.

The Maroon 5 frontman can't believe his fellow judge on 'The Voice', Christina Aguilera, likes to go commando and has praised the benefits of pants to keep "everything in check" down below.

Adam joked: "It's so funny because I love to wear underwear. I'm not kidding. It keeps everything in check, you know? Like, I think it's nice to know everything is set. [With] no underwear ... I don't know what could happen!

"I don't want things flopping around. I don't know if that's the same for women, it's a little simpler down there for you guys. I just need a buffer zone between my junk and the outside world."

The 'Payphone' singer is keen to keep his seat on the judging panel of 'The Voice' as long as possible, despite Christina and Cee Lo Green both taking a year off to work on their own music careers.

He said: "There's a chance that someone could replace me and be better than me and then, I'd be fired. I'm not going anywhere!"

With new A-list judges Usher and Shakira keen to step into their shoes, Adam worries the panel is easily expendable.

He told Access Hollywood: "Who knows what's going to happen. They're always welcome back. But that's what THEY [the producers] say!"