Christina Aguilera sat down with 'Access Hollywood' to talk a lot about her boobs and her relationship with 'The Voice' judges Blake Shelton, Cee Lo and Adam Levine, but also her decision to sign on for Season 2 and the strides she's making toward world hunger relief.

"I have such fun with the guys," Xtina says of her experience on 'The Voice.' "You gotta keep them in check a little bit, because it's like being in a boys locker room sometimes. But, you know, I can hang with the guys. It's fun!"

The pop pathmaker said that she heard the rumors that she wouldn't be back for Season 2 of the hit NBC show, but says she has no idea where they came from. She'll be back, despite her fellow judges' constant remarks about her unique outfits and protruding chest.

"He is hilarious," Aguilera says of her country co-star Shelton, who is constantly on the subject of her 'girls.' "We were laughing that my boobs are a big judge, I guess," she adds with a big laugh.

On a more serious note, the 'Genie in a Bottle' icon is using her star power for good with a strong effort towards world hunger relief. When 'Access Hollywood' caught up with Aguilera, she was on set filming a new PSA, and opened up about the small person who pushed her to help out.

"As a mother myself, me having a 3-year-old son you know, it's important for me to get involved and show this example to him," she says. "He has so many opportunities in front of him and, God, he's so young and impressionable. You just look at this face and you want to do all in your power to help them thrive. Every child deserves that opportunity as well."

To see more behind-the-scenes footage from Christina Aguilera's PSA ad for World Hunger Relief, entitled 'From Hunger to Hope,' and to learn how you can help, click here.

Watch Christina Aguilera on 'Access Hollywood'