Pink has confirmed the birth of her daughter on social networking site Twitter.
The musician was photographed entering a Los Angeles hospital with husband Carey Hart on Thursday afternoon.
A post on her official Twitter account read: "We are ecstatic to welcome our new beautiful healthy happy baby girl, Willow Sage Hart. She's gorgeous, just like her daddy. #beyondblessed"
No further details about the birth have yet been released.
Pink had earlier fuelled speculation that her child was on the way with a mysterious tweet speaking of "a good time to start something new".
The 'So What' singer revealed that she was expecting a girl when she broke news of her pregnancy on The Ellen DeGeneres show late last year. She joked that her mother had "wished me a daughter just like me... I'm terrified one of us will go to jail!"
Pink married motocross racer Hart in January 2006. The couple separated in 2008, but reunited early the following year.
