Bah humbug!

With Christmas just one week away, Justin Bieber isn't planning to head to bed early Dec. 24 to await the arrival of Santa Claus. In fact, the teen pop phenom says he's never believed in the man in the big red suit!

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"My mom always told me there wasn't a Santa," Bieber says in a new interview with AOL Music. "This was her logic: She thought if I grew up knowing about Santa then finding out he wasn't real, that it would be like she was lying to me. And then when she told me about God, I maybe wouldn't believe her."

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Applauding his mom, Pattie Mallette, and her decision to be "straight-up and honest with me all the time," Bieber insists he kept the holiday spirit alive for his childhood pals. "I didn't tell my friends or ruin it for anyone -- I was a good kid!" he tells AOL.

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Instead of opening presents from Santa under the tree, Bieber and his family opted for a unique gift exchange.

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"We played a game on Christmas Day where everyone brought a girl gift and a boy gift. You roll the dice and if you get doubles, you get to pick a present and if you don't, it's the next person's turn. Then, the next time you roll doubles you get to choose someone else's present and switch," he explains. "One time I really wanted a Game Boy but I ended up with pots and pans, which was disappointing. I think I gave them to my mom."

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This year, Bieber will return to his native Canada to enjoy Christmas Eve dinner with his mother's relatives, and then head to his dad's house on Christmas Day to spend time with his younger brother and sister.

Asked about his Christmas wish list, Bieber -- who dates Selena Gomez -- isn't picky.

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"To be honest, I really don't have any Christmas wishes this year... I just wish to be happy and that everyone be healthy in my family," he says. "And I wish that everybody gets to hear my Christmas album -- and hopefully like it!"

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