Carrie Underwood recently celebrated her son Isaiah’s first birthday, and the first-time mom says that more children are definitely in her future.

In an interview with People, the "Heartbeat" singer was asked where she sees herself in five years, and the 32-year-old admits she hopes to give baby Isaiah a sibling in the not too distant future.

“I definitely see one more baby. At least,” she tells the magazine. "Oh, Isaiah will be in kindergarten. Mike will most likely be retired by then. He'll be 40! He's like the second-oldest on the team already."

"We'll be living out here in the country," the singer predicts. "We have land that's five minutes away that we're going to build on. Career-wise, I have no idea. There are so many factors."

Underwood says that she and husband Mike Fisher plan on their current Tennessee home to be their "forever home."

"I have ideas of having a garden, being outside a lot, even when I'm old," she explains. "My best friend ... is going to live next to us. So we'll just be crazy old ladies together."

Underwood gave Isaiah a fish-style birthday party on Feb. 27, with an aquatic birthday cake, which the star posted photos on social media afterward. She shared the big birthday plans for her son with ET at the Grammys, admitting she wasn’t even sure what she wanted to buy him for a gift.

“[We are throwing] a little party, just family and friends, people that are staples in his life. It won’t be anything fancy,” she dished. “I’m like, ‘What do you get a 1-year-old for a present?’ I have no idea so I’ve been on Amazon trying to find presents for him.”

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