Hard Grammy is the best album cover - because of what it means and stands for, not because it's "pretty."
First of all the concept is amazing"
"the juxtaposition of tough and sweetness, or as Madonna so eloquently expressed: 'I'm gonna kick your ass, but it's going to make you feel good."" #HarderIsBetter #NoSweatNoCandy So it's also a bit of a life and well-being message, work the **** out fatties!
And then, there's the case that she blatantly thought "What are 50yr old women
not supposed to do in society?" and of course she realize "A-ha! Be sexy!" And just like made the most in your face, legs-spread, suggestive, scantily-clad cover and didn't give a fk about trying to be classy or appropriate - and the facts are, she looks amazing, fit, trim and wither classic creamy white skin on display.
It's literally a big "**** you" to everyone ageist, sexist and of the belief that she's "passed her best" when she's anything but.
Like, it's not the most powerful because we associate it with the content of the album but it's the best one to look at and it's striking as an image. 
The rest of the covers can take a seat.
