Blake Shelton Invites a 6-Year-Old Boy in Need of a Heart Transplant to Perform a Duet

Wyatt's mother said Blake Shelton "absolutely made Wyatt's day" by bringing him on stage during his Saturday concert.

At his concert in Durant, Oklahoma, the 45-year-old country singer invited 6-year-old Wyatt McKee to join him on stage for a rendition of "God's Country."

Harley McKee, Wyatt's mother, posted a sweet video of the moment to Facebook, showing Wyatt. The latter has hypoplastic left heart disease, a condition in which "the side of the heart is not derdeveloped," according to the Mayo Clinic, adorably telling Shelton his name.

The singer then read a sign Wyatt had held up that said, "Your smallest, biggest fan from Lake Texoma, 6 years old waiting on a heart transplant," as well as another asking if he could sing "God's Country" with Shelton.

"Do you think you're having a bad day? Put that in perspective, man, "Wyatt's condition was revealed to the audience by The Voice coach. The two then began singing the song together, and after a few minutes, Wyatt returned to his seat to applause from the audience as Shelton said, "Y'all give a big hand for my friend Wyatt!"

"I don't know if Blake Shelton will ever see this, but I just want to let him know he is awesome and officially my favorite person. He made Wyatt's day. Thank you so much to him and everyone who stopped us to tell him how great he was on stage and told him they are praying for him!!!" Harley captioned the video.

"A night to remember!!! #WyattStrong," she continued.

Shelton wrote on Sunday after retweeting a video of the moment, "This little companion made my night. Thank you for joining me in singing 'God's Country,' Wyatt!"