Music superstar CARRIE UNDERWOOD is getting ready for diaper duty!

The ENQUIRER has learned that the Grammy-winning star was so touched after becoming involved with vari­ous orphanages and children’s charities that she’s talked her NHL hockey star husband Mike Fisher into adopting.

Late last year the 28-year-old singer shot down pregnancy rumors, claiming that she and Mike had little time together because she was living in Nashville and he was in Canada.

But all of that changed in February when Mike was traded from the Ottawa Senators to the Nashville Predators, and pals say the two are finally ready to rock a cradle.

“Doing humanitarian work really opened Carrie’s eyes to the number of orphaned children around the world who are just waiting for a loving home,” re­vealed a close pal.

“She has been to Africa twice on behalf of ‘Amer­ican Idol,’ visiting or­phanages, hospices and health-care centers as part of the ‘Idol Gives Back’ project.

“Carrie literally fell in love with every child she came in contact with – and wanted to take each of them home with her. She wasn’t married at the time, but always prom­ised herself one day when she hit it big, she would adopt a baby.

“Now, since her career is so hot, she doesn’t have time for a pregnancy or the time it would take to get her body back in shape, so she thinks adopting is a perfect alternative.”

The country cutie got hitched to her 31-year-old hubby in July 2010 at a lav­ish outdoor ceremony in Georgia, and now that she’s settled in she feels ready to expand the family.

The singer’s pal added that an upbeat Carrie even joked: “If adopting is good enough for Angelina Jolie and Brad Pitt, it will be good enough for Carrie Underwood and Mike Fisher!”