HOLLYWOOD, CA - MAY 23:  Motorcycle Racer Carey Hart, singer Pink and daughter Willow Sage Hart arrive at the premiere of Dis
Axelle/Bauer-Griffin/FilmMagic

Congratulations to Pink, who gave birth to her baby during the Christmas holidays! "Jameson Moon Hart 12.26.16," the singer tweeted with a adorable photo of her gazing at her smiling newborn son. Warning: the endearing shot will immediately give you some intense baby fever.

Jameson is the second child for Pink and husband Carey Hart, who have a 5-year-old daughter, Willow Sage. The singer announced the pregnancy news last month and shared lovely bohemian-style photos of Willow hugging her mama's bump.

Just look at those chubby cheeks!

Pink and Hart will celebrate their 11th wedding anniversary on Jan. 7. Take it back to 2001 with this Besterday podcast episode, where we celebrate 15 years of Pink's sophomore album Missundaztood: