The singer announced she was expecting in November last year with a simple 'Surprise!' showing off her huge baby bump as Willow cuddled her.
Pink hinted in May last year to Good Morning America she was verging on having another child telling them, "I love being a mama. I made a choice a long time ago that I was going to have a successful family and that is my absolute number one goal in life," she said.
"I feel like I have two kids right now. I would like a third. No, I want to say that Carey Hart's an awesome husband and a really good dad, but he's also like a second child," she continued.