Pink Adorably Throws Daughter Willow a ‘Big Sister Party’ to Celebrate Son’s New Arrival

Pink is making sure Willow loves being a big sister.

The 37-year-old singer took to Instagram to give fans a peek at her fun-filled Saturday, which included a "big sister party" for her 5-year-old daughter.

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

"Congrats Big Sis! #bigsisterparty," Pink captioned an adorable pic of herself holding newborn son Jameson Moon, while Willow smiled in front of a cake made just for her.

Congrats Big Sis! #bigsisterparty

A photo posted by P!NK (@pink) on Jan 14, 2017 at 6:15pm PST

The "Raise Your Glass" singer has done a lot of celebrating lately. Just last week, she and husband Carey Hart celebrated their 11th wedding anniversary.

WATCH: Pregnant Pink Shares 'Super Cute' Sunset Pic of Husband and Daughter

On Dec. 26, Pink and Hart welcomed baby Jameson, their second child together.

Jameson Moon Hart 12.26.16

A photo posted by P!NK (@pink) on Dec 28, 2016 at 2:31pm PST

See more on the adorable family of four in the video below.

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