It took me a long time to like it, but "Like A Prayer". It's epic and brilliantly constructed. Best melody though is "The Power of Goodbye". great video too with her playing chess.
She had found the perfect image around the time of the "Ray of Light" videos - coolly sophisticated seductress of "a certain age." And the she went and blew it all by going back to being a disco slapper.
I laugh myself stupid when Wogan plays the new record and takes the piss out of her "chat up lines" talky-bit, saying "Oh for heaven's sake sit down woman" and so on.