JOE NICHOLS and his wife Heather have revealed the sex of their baby. IT'S A GIRL! And will be here around May 20th. 

She'll join their two-year-old daughter Dylan and Joe's 15-year-old daughter Ashelyn, from a previous relationship.

He says, “I’m so outnumbered . . . I am toast!”

Joe plans on taking time off before and after the due date to insure that he's around when the baby arrives. (People)

We talked to ole Joe back before the WINTER JAM . . . and he was already gettin' all mushy about the new baby. Listen HERE.