Despite his disclaimer, Hart was inundated with criticism, where several pointed out that Jameson was not fitted with goggles.
Now Pink is weighing in.
Sharing a snap of her son covered in chocolate, she asked, "Chocolate is good for babies right? Help me Instagram, we can’t possibly parent without you."
But the mum - who also shares eldest daughter, Willow, 7, with Hart - lost her cool when one fan spoke about her husband's parenting.
“I love your music, your kids are beautiful,” the person wrote. “But your husband, I’m sorry, lacks the responsibility your kids need in his care.”
Pink quickly responded.
“You sound well informed on the performance of my husband as a father. Answer me this: how often have you spent time with my husband? How often have you watched him parent?” the singer wrote.
“Do you know my children? Are you aware of their development? Even better: what are your credentials in Parenting expertise?”
She continued, “You sound like a person that could learn something by looking at all of this.”
“God bless your perfect path. I have no interest in that myself. However, do check in from time to time to let us know what other teachings you may have for us, oh perfect f—king stranger.”