Kelly Clarkson I Must Confess ... I'm Knocked Up! [TMZ TV]

8/20/2015 6:00 PM PDT

Kelly Clarkson blurted out her big news during her L.A. concert ... she's expecting baby #2! Fans were so excited ... that some of them went out and ran up $100 bar tabs! And yes, some of them work at TMZ.

Get ready for adventures in ridiculous-expense-reports.