More babies for Beyonce and Jay-Z?

It sounds like Blue Ivy won't be an only child for long.

Beyonce told "Entertainment Tonight" she "definitely" wants to have more kids with her husband, Jay-Z - and that she's open to the amount.

So does that mean a "19 Kids and Counting"-size brood is in her future?

Bey says she hasn't even gotten that far in the planning process.

"I don't know how many," the 30-year-old superstar said. "God knows I don't know yet."

But one thing the world's most beautiful woman does know is that she was meant to be a mom.

"I have such a full life," she said. "I feel like now I know the reason that I was born."

In the meantime, the singer says she's just happy to fit nicely into her non-maternity clothes - especially since she hasn't been working out much.

"I haven't had much time in the gym [since Blue was born]," the celeb revealed. Instead, "I've been rehearsing," she said of the secret to her slim shape. "I have a show coming up and it's my first show in a year."

Bey hits Atlantic City for a series of shows this Memorial Day.