LOS ANGELES (AP) - It's hard to be a working mom, even for Christina Aguilera. The 27-year-old pop star said she's navigating the "balancing act" she expected when she took on parenthood with her husband, Jordan Bratman.

"I wasn't going to give up who I was before I had the baby," Aguilera said on the red carpet outside the Nokia Theatre, where she performed Wednesday during the "Grammy Nominations Concert Live!"

"It's important to stay true to that as an example — also for my son to find out what his goals are, what he's passionate about doing, so it's sort of leading by example in that sense," she said. "It's a tough thing. I had a moment leaving him today to get ready for tonight of missing him, but every working mom goes through it. They know what it feels like."

Aguilera performed "I Loves You Porgy" from George Gershwin's "Porgy and Bess."

- Click for pics of Christina in a sexy strapless dress on the red carpet
- List of Grammy Nominees

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