Perhaps Gwen Stefani and Shelton will hold blind auditions and ultimately let America decide who will do it?
It may seem strange that Adam Levine would namecheck American Idol judge Luke Bryan, but the country singer is famously known to be a good friend of Blake Shelton.
That would be the most exciting possibility, I believe, though also the least likely without a doubt.
Perhaps it’s because Shelton didn’t have to listen to Bryan on The Voice for multiple seasons that he would get a chance to sing at the wedding, though we don’t know who will or won’t be singing at this event in either case.