"I know the Grand Ole Opry is very important to y'all, because this is the first place you guys played together as a group in 1999," McEntire said after her impromptu collaboration with the band on "Pontoon." "I have been asked to ask y'all, Little Big Town, would y'all like to be a member of the Grand Ole Opry?"

Once the entire group hugged McEntire and accepted their invitation with a collective "yes," McEntire left parting words for the audience. "Special moments like this - they're priceless," she said.