Willow Sage Hart had her first photo shoot on June 9, a week after her birth. That same week, she enjoyed her first stroll on the beach with her parents, singer Pink, 31, and racer Carey Hart, 35.

“Willow is a pro!” Pink, 31, tells PEOPLE. “Or else she is borderline narcoleptic like her daddy – she slept the whole time.” She’s probably sleeping all the time because she’s a newborn?

Pink said her first experience as a mother includes snot, tears and poop.

“My life was once whiskey, tears, and cigarettes… now it’s snot, tears, and the color of poop. #bliss,” she tweeted last Tuesday. She added, “I do miss the whiskey though.”

“You hear people say it all the time, how life changes so drastically. But you can’t possibly grasp how beautiful that is until you have your child,” Pink told People magazine.

Willow is the first child for Pink and Carey who have been married 5 years.