Christina Aguilera Is Now A 31-Year-Old Boring, Well-Adjusted Mom [Pictures]

People change over time, right? Christina Aguilera, for example, is living her 30's are like her hot-flashing 50's. Ten years ago, when X-tina released Stripped, she would gyrate her pelvis basically every time she had a camera focused on herself. Now saying "balls" to a Marie Claire reporter makes Aguilera feel embarrassed:

"'I'm 31 years old,' she continues. 'That's a new chapter in a woman's life where you just want to grab life by the' -- she clenches her fist -- 'well, I can't say balls!" (She's a mom now, after all.) She laughs, her big blue eyes widen. "You want to grab life, embrace it, a live it to the fullest."

Let's be clear: there's nothing wrong with being a boring, well-adjusted mother (in fact, it's better than having "cool," embarrassing parents). But, dude, you're a 31-year-old "dirrty" pop singer, not that near-fossilized nun that lights the Virgen Maria candles at the Catholic church around the corner from my apartment.

Click here to see pictures of Christina Aguilera on the cover of Marie Claire's 2012 February issue.