Earlier this week, Shelton said on the "Tonight Show" they were considering "If You Leave" by OMD but later clarified and said he was only kidding.
"People out there should know I've never given an answer to any question in my life from Jimmy Fallon that wasn't complete bullcrap," he joked Friday on TODAY. "Why would I be honest with Jimmy Fallon?"
Shelton, whose new album, "Body Language," is out Friday, said he still doesn't know what song he and Stefani will use for their first dance, even though he said he loves "If You Leave" and all '80s music.
During his virtual "Tonight Show" appearance, the country music star had hinted that he and his fiancée were considering "If You Leave" for their upcoming nuptials.
Before discussing that song, though, Shelton was a little confused when Fallon asked him what their first song would be.
"I think it's called the 'Wedding March,'" Shelton said matter-of-factly.
"No, not that song, not the procession," Fallon clarified.
Realizing that the talk show host was referring to the song for the couple's first dance, Shelton revealed that they have one tune in mind.
"It's 'If You Leave' from the 'Pretty in Pink' soundtrack," he said.
"That's not true at all," Fallon quipped.
"I swear, I have it right here," the 44-year-old insisted, holding his phone up to his camera and displaying the song.
"OMD?" Fallon asked, referencing the British synth-pop band Orchestral Manoeuvres In The Dark.
"We talked about this, we both love the song, we're both fans of the '80s, why not, why not, Jimmy?"
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Earlier on in their conversation, Fallon had joked that he wouldn't be available for the wedding, but once he heard about the couple's potential song choice, he changed his mind.
"Now I can make it to the wedding by the way, I'm very available," he said.
The talk show host also offered Shelton an alternate first dance song: "True Love Ways" by Buddy Holly.
Shelton wasn't familiar with the tune, but Fallon was happy to sing it for him. During his performance, the country singer seemed unimpressed and when Fallon got out of his chair to get closer to the screen, Shelton playfully backed away from the camera.
Back in March, Shelton told Hoda Kotb and Jenna Bush Hager about a potential date for his and Stefani's wedding and told the co-hosts that he's hoping they can tie the knot before the fall.
"I'm afraid if she and I wait until next November, then I'm right back into 'The Voice' cycle again, and I really want to be able to have plenty of time before and after, so hopefully this summer," he said. "I think we're right here at the point with COVID, it looks like it may be OK, but don't know, so that's tentatively the plan."