The country singer gave birth to son Isaiah Michael Fisher last week and posted an adorable photo on Instagram and Twitter.
"Tiny hands and tiny feet. God has blessed us with an amazing gift! Isaiah Michael Fisher — born February 27. Welcome to the world, sweet angel!" Underwood posted about her new baby boy with husband Mike Fisher.
The 31-year-old singer had to make some changes to her vegan lifestyle when she became pregnant, Entertainment Tonight reveals. "I have been a little more vegetarian than vegan, especially with traveling, so it's a little hard to order food from hotels and stuff when you're vegan," she told the outlet. "Now I'm pregnant, it's like, I can't just order steamed broccoli. That's not going to cut it."