Pink and Husband Carey Hart Expecting 2nd Child

She's already a mom to 5-year-old daughter Willow.

Pink, 37, announced the news by sharing a photo on Twitter of herself with the couple's 5-year-old daughter, Willow. Pink appears extremely pregnant, and Willow is resting her head on her mom's belly. The caption reads, "Surprise!"

Ever since Pink, born Alecia Moore, and Carey, 41, welcomed Willow in 2011, the singer has been talking about the possibility of expanding her family.

The two wed in 2006.