Jessica Simpson's fat days are numbered ... she just popped out baby #2, TMZ has confirmed.
Jessica's rep tells TMZ ... the singer gave birth to a baby boy earlier today in an L.A. hospital. She and husband Eric Johnson named the lil tyke Ace Knute Johnson. North was taken.
Jessica and Eric have one other kid together ... daughter Maxwell ... born May 1, 2012.
So now the only question is ... who's gonna shed those baby pounds first ... Jessica or Kim K?