Story highlights This is the second child for Clarkson and husband Brandon Blackstock

"That was not planned," she said of her announcement

(CNN) "Miss Independent" will now have two dependents.

Singer Kelly Clarkson announced during a show at the Staples Center in Los Angeles that she's "totally pregnant."

This will be baby No. 2 for Clarkson, 33, and husband Brandon Blackstock.

The surprise announcement came Wednesday night after Clarkson broke down while singing "Piece by Piece," a song about her relationship with her dad.

"I wasn't planning on announcing. ... Totally pregnant," she gushed.