Select all span elements except those which class contains the word icon

I'm implementing the following CSS Selector

Select all span elements except those which class contains the word icon

So the following seems to be working:

.music-site-refresh span:not([class*="icon"]) {
  font-family:Montserrat, sans-serif;
}

But I thought it should be like this:

.music-site-refresh span:not(span[class*="icon"]) {
  font-family:Montserrat, sans-serif;
}

But the second one doesn't work in my testbed.

Could anyone explain me which one is correct and why?

via Chebli Mohamed