Singer Carrie Underwood is "definitely" open to having a few more children after experiencing such an easy time with her first born.

The former American Idol winner and country megastar welcomed son Isaiah Michael with husband Mike Fisher in February last year (15), and Carrie is enjoying motherhood so much she can't wait to expand her brood.

"Oh definitely!" she exclaimed when asked by People magazine if she wanted more children. "I’m not sure when because we’re both kind of busy these days, but yeah, definitely. And I’m like, ‘He’s so good — I could do a few more of those.’"

Even though she spends a lot of time managing her career duties, Carrie is still able to find plenty of quality time with her little boy and can't quite believe how much of a "good guy" he is.

"He’s an easy baby," she smiled, before revealing he's a good little eater too. "He loves everything. He’s not a huge meat eater, but he likes turkey and stuff like that. Lots of veggies."

Isaiah seems to be following in his mother's footsteps when it comes to music too, with Carrie revealing he likes to sing, but above everything else, his favourite thing to do is be on his feet exploring.

"Right now he is a climber, which is not good,” she laughed. “He’s into everything. He runs."

Carrie may have her hands full with her little man, but the musician recently revealed she actually thought she was having a girl in the early stages of her pregnancy.

"I had my heart set on it, which is partly why we decided to find out," she told Britain's Hello! Magazine. "I don't like surprises and there's no such thing as gender-neutral baby clothes. When we discovered we were expecting a healthy baby boy we were so excited. I wouldn't change him for the world. He's perfect and where before I couldn't imagine my life with him, I now can't imagine life without him."