Pink and hubby Carey Hart welcomed a baby girl on Thursday.
"We are ecstatic to welcome our new beautiful healthy happy baby girl, Willow Sage Hart," the singer, 31, tweeted. "She's gorgeous, just like her daddy."
Pink (real name: Alecia Beth Moore) met Hart, 35, in 2001 at the X-Games. Following a brief separation in 2003, Pink proposed to her motocross beau in June 2005.
The two married in January 2006 and then separated in February 2008. But after marriage counseling and working through their issues, Pink confirmed in February 2010 that she and Hart were back together and expecting their first child.
In November, Pink told Access Hollywood about the unusual name she and Hart were considering at the time. "My dad's name is James, and my brother's name is Jason… Carey's middle name is Jason, [and] Jameson–we like whiskey. That's a no brainer."
In November, she released her Greatest Hits…So Far!!! album, which included a new song dedicated to her unborn child. She wrote on her blog the significance behind the track, "F***ing Perfect," saying: "I have a life inside of me, and I want her or him to know that I will accept him or her with open and loving and welcoming arms. And though I will prepare this little munchkin for a sometimes cruel world, I will also equip this kid to see all the beauty in it as well."