Bo Bice and Merrin Elizabeth Joy Bice Credit:

Break out the pink balloons!

American Idol's season four runner-up Bo Bice and his wife of nearly seven years, Caroline, have welcomed their fourth child, the rocker, 36, confirmed on his website Tuesday.

Born on Monday, Merrin Elizabeth Joy -- the couple's first daughter -- joins big brothers Ean, 2, Caleb, 3 1/2, and Aiden, 6 1/2.

"Merrin was a healthy 8 lbs 11 oz. Both Mom and baby are doing great!" Bice's web site statement confirms.

The family resides in Nashville.