I don't think you should think of dance music vocals as lyrics in the traditional sense. They're as much about sound and texture as they are about meaning.
Nor rap, as it doesn't generally have a verse/chorus structure. Claiming it's not music aside, fans tend to describe it more as poetry, which is generally non-repetitive.
I'm guessing it would be extremely repetitive for poetry though.
Can't think of a better example than Daft Punk's Harder Better Faster Stronger. Very repetitive lyrics on paper, but so much more when rendered as audio.