Pink's Newborn Son Rocks Adele-Inspired Onesie in Super Cute Pic

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Pink's son Jameson is Adele's littlest fan.

The 37-year-old pop star shared one of the first photos of her newborn baby, who is seen crying while wearing a onesie with lyrics from Adele's hit song, "Hello."

WATCH: Pink Adorably Throws Daughter Willow a 'Big Sister Party' to Celebrate Son's New Arrival

"Hello, it's me. I must have cried a thousand times," the onesie reads.

The cute snap comes after Pink and her family participated in the Women's March in Los Angeles, California, on Saturday. The "So What" singer posed with husband Carey Hart and daughter Willow while holding Jameson. She also carried a sign that read: "Unity, love, equality, and a dash of nasty."

In her first interview since giving birth, Pink told Ellen DeGeneres that her 5-year-old daughter is slowly adjusting to being a big sister. "I'm trying to [put Willow first.]" she shared. "She's a little weepy these days. We're working that out."

PHOTOS: Pink's Daughter Willow Meets Her New Baby Brother Jameson -- See the Adorable Pic!

Here's a look at the "big sister party" that Pink threw for her daughter: