Didn't see the show, but that looks like the two-man group LMFAO who's had a recent hit with their song Party Rock Anthem.

I thought most singers/groups outside their breakthrough period end up seeming dated anyway, not just her. Probably because popular music tends to be aimed at a young audience in particular and shows quick changes in style. And when younger she was more agile dancing and her voice was fresher. I'm not even a huge fan of her but I think some lose perspective.

i think if your talent was as big as your fanbase, it never dwindles

Elton John and Phil Collins kept going on for a remarkably long time, and never seemed to be "dated"

Madonna's talents, are a bit on the "thin" side

That's questionable.

Uh, no, probably not. Maybe almost anyone can laboriously learn to do certain moves decently, but it takes natural athleticism to be able to what Madonna does. (Look up dancing and bilateral symmetry.)

I was thinking about another comment, on Madonna's nasal voice. She had a "girlishly sexy" voice when starting out that went well with her original image, but had she kept singing like that, her career would have died quickly.

I found it creepy that she was 'singing' like that for much of the Super Bowl performance. It's not age-appropriate. Can she still sing like that, or were her vocals auto-tuned?

Natural athleticism? I thought she just did yoga and ate like a bird. For the record, Madonna is a very average dancer also.

I don't know why anyone even cares about dancing. Except for ballet maybe.

I don't know how good a dancer Madonna is now or was in her prime, but obviously it's better than most people.
"After graduating, she received a dance scholarship to the University of Michigan.[10] She convinced her father to allow her to take ballet lessons[11] and was persuaded by Christopher Flynn, her ballet teacher, to pursue a career in dance."
Edit: the sentence before that in the Wiki page says she was a high school cheerleader, which of course requires athleticism.

The yoga and other stuff probably came later.