The singer, joined by her husband, Carey Hart, named their
daughter Willow Sage Hart.
The 31-year-old expressed her delight, telling Twitter followers
the news: "We are ecstatic to welcome our new beautiful healthy
happy baby girl, Willow Sage Hart." She added: "She's gorgeous,
just like her daddy."
Several hours earlier, the singer said: "New Moon in Gemini today
:) a good time to start something new." The tweet caused
speculation that she was about to give birth.
A source told Radar that the birth went "without a hitch" and the
new mother and baby were doing well.
The source added: "Everything went exactly to plan and Pink and
Carey are absolutely thrilled".