Mike Love, special artist I think.
Beautiful song but skip forward to 4:20 for the real jaw dropper – he sings in what sounds like staccato gibberish for a few measures before you realize he’s actually singing in out-of-order fragments, then loops them back around several times over until the lyric comes together, piece by piece. By the time you figure out what he’s doing, you can’t help but be blown away by what you’re hearing. I don’t even know how someone can think of that. Truly awesome.
https://www.youtube.com/watch?v=fU7hZ3smj0g