Pink Shares Her Secret for Successful Motherhood

By Gabrielle Olya

11/14/2011 at 11:05 AM EST

For new mom Pink, balancing a busy career and motherhood is really just a matter of proper timing.

"As long as my boobs are at home at a certain hour, I can do whatever I want," the singer-actress, 32, told PEOPLE at the Hollywood premiere of Happy Feet Two.

Pink, who voices the character of penguin Gloria in the 3D computer-animated film, finds participating in family-oriented movies more meaningful now that she and husband Carey Hart have daughter Willow Sage.

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"It just touches a different part of your heart," she says.

And while 5-month-old Willow isn't yet old enough to see her mom's movie, Pink says she is looking forward to showing it to her in the future.

"In a couple years, I'm going to scare the crap out of my daughter with this movie!"