“Oh hey old man #swoon,” the Grammy Award-winning singer captioned the cute image of her smiley son standing up in his playpen.
The proud mama also posted a video of her 6-year-old daughter Willow who just lost a tooth.
“Hahahahaha somebody’s feeling the tooth fairy #golddigger #wigglewiggle#inflation,” she wrote.
And she shared a selfie with her daughter, writing, “THANKYOU for the love. Sincerely.”
The Try hitmaker – who turned 38 on Friday – was thanking fans for all the birthday love.
“Happy birthday to my amazing wife @pink,” the singer’s husband Carey Hart wrote via Instagram.
He added: “Thank your for letting me be along for the ride all these years. I’ve watched you grow from a kid to an amazing woman and mother. Sorry that the sick kids kept us apart on your birthday, and I can’t wait to give you a birthday spanking! Love you.”
Happy birthday, mama!