Pink and Hart are expecting a second baby [photos]

The singer announced Saturday she is pregnant with her second child, via an Instagram photo that shows her sporting a big baby bump and standing next to the couple's five-year-old daughter, Willow Sage Hart, who they welcomed into the world in 2011. "Surprise!" Pink wrote. The news isn't a huge surprise considering the singer sat down on Good Morning America in May and couldn't help but gush over being a mom, hinting that she definitely wanted more kids. "I love being a mama," she smiled. "I made a choice a long time ago that I was going to have a successful family and that is my absolute number one goal in life."