Paul Stanley is a dad again! The lead singer of Kiss and his wife Erin welcomed Emily Grace Stanley to the world on Tuesday in Los Angeles.

Emily joins a sister and 3 brothers: Sarah Brianna, 2½, Colin Michael, 4½, and Evan Shane, 17, Stanley's son from a previous relationship. Their hands are full. Three kids under the age of 5? Yikes!

Erin and I are once again blessed with the addition of Emily Grace to our family," the rocker, 59, says. "I'm not sure she can sing but her first screams let me know she's definitely Daddy's girl."

Stanley – who's also a successful painter – just completed a series of sold-out KISS dates and is currently producing the band's next album.

As for having kids later in life, Stanley says his age doesn't slow him down.

"I may be 59," he told PEOPLE in February, "but the only rocking chair this rocker is getting ready for is the one for my new baby."