Pink shares baby Jameson Moon Hart and Willow with her husband of 11 years, Carey Hart.
Pink gave birth to her baby son on December 26 and the star is making sure her firstborn is enjoying her time as a big sister - by throwing her a fun-filled party to celebrate!
The 37-year-old singer took to Instagram to share a sweet snap of her 5-year-old daughter beaming beside her mother as she held onto her newborn.
"Congrats Big Sis! #bigsisterparty," Pink captioned an adorable picture.