Pink has announced she is pregnant by posting a photo to Instagram showing off her blossoming baby bump.
"Surprise!" she captioned a photo of her young daughter Willow, 5, nestled up against her large bump, swathed in linen.
The impending arrival will be the singer's second child with former BMX champion Carey Hart.
Pink, 37, has kept a low profile this year and, in recent months, only posted photos to social media with items that strategically covered her abdomen region.
The couple separated in 2008 amid cheating allegations after two years of marriage.
Pink then released her top charting song So What, which was inspired by their break-up.
They underwent couples therapy before reconciling in 2010.
Willow was born in 2011.
Just this year Pink has spoken about her want to have more children.
"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 during an interview with Good Morning America.
"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 last graced a red carpet in May wearing a loose fitting gown for the premiere of the film Alice Through The Looking Glass, where she performed her latest song Just Like Fire for fans - also in shapeless attire.
Pink's decision to keep her pregnancy under wraps follows that of Lara Worthington, whose favourite pastime is teasing photos of bumps and shadows of babies to her 482,000 followers on Instagram.
She has reportedly given birth to her second child in recent weeks.
Representatives for both her and husband, Sam Worthington refused to comment.