Critics were quick to jump on the post, asking "are they over 21?"
She's been candid about everything from breastfeeding shaming to the ridiculous pressure mums face to lose the baby weight. But now, Pink has opened up about marriage and "bed death" - or those dry spells many couples face in long-term relationships.
And we can all relate.
"I am blessed," she wrote.
"Good for mummy too!" the famous mum wrote.
The superstar has reflected on life as she prepares to turn 50.
This tradition has been running for five years in Jennifer's house, so she clearly knew what she was getting herself into.
The celebrity mama shares her biggest parenting struggle.
Emma Stone has opened up about living with anxiety - and how therapy helped her as a child.
The model said the boys, aged 10 and 12, had "rocking bodies".
Here's some news guaranteed to make you feel old: Reese Witherspoon's lookalike daughter, Ava, turned 18 over the weekend.