Christina Aguilera Says Max Is Her "Worst Critic"

Christina Aguilera admits her 2-year-old son Max is not impressed with her singing. The pop star was on Conan O'Brien's talk show when they discussed what songs she sings to her little boy.

She said, "I tone it down when I'm singing lullabies to him, I don't sing Lady Marmalade. I definitely don't bring out the pipes for lullabies. He does have a mind of his own though. Sometimes he'll be my worst critic and he'll go 'No mommy not 'Twinkle Twinkle', not tonight. Not that one, sing 'Wheels on the Bus' instead.' "

Christina, who is separated from Jordan Bratman, says from three years old she knew she wanted to be a singer.

She said, "I would throw a towel on the floor as my stage and use a shampoo bottle for my microphone."