The Grammy-award winning artist has posted a video online of little Isaiah, who celebrates his second birthday today, singing about the love of Jesus.
In an Instagram post Underwood, who won the fourth season of American Idol in 2005, filmed herself and her son singing the popular children's song "Jesus Loves Me."
Underwood is heard singing the chorus of the song, to which her son responds and echoes the same. They then sing together: "The Bible tells me so."
The video has already had more than 1.3 million views and almost 7,000 comments.