Carrie Underwood and husband Mike Fisher's firstborn son, Isaiah Michael, will turn a year old on Feb. 27, and the "Heartbeat" singer has plans ... but they're not huge.

Underwood shared details of Isaiah's milestone celebration with Entertainment Tonight on the Grammy Awards Red Carpet Monday night (Feb. 15).

"[We are throwing] a little party, just family and friends, people that are staples in his life. It won't be anything fancy," she explains. "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."

The first-time mom admits that she has no idea what to tell family and friends about gifts for her baby boy, but she still has a week to figure it all out. "I'm just going to have to just go to the store and look," she adds. "People are like 'What is he into?' I'm like, 'I don't know. He's one!'"

Currently headlining the Storyteller Tour, Underwood says that her son is adjusting well to life on the road is even walking as of the night of the kickoff show. The family tries to maintain a "loose-y goose-y" experience as far as schedules go for baby Isaiah.

"He has a schedule, but it's not crazy 'cause we're in different time zones and we're in different hotel rooms and are on the bus or back at home," Underwood says. "So we try to keep some consistency, but just trying to make him roll with it, and so far, so good."

Isaiah Is Walking!

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