As a pop star, George Michael was a gleeful contradiction. Colorful pastels are all over Wham!'s playful “Wake Me Up Before You Go-Go,” but the all-white tones of “A Different Corner” almost seem to be a statement of purity. Of course, any suggestions of innocence are abandoned with the supermodel sensuality of “Freedom! '90” and the glitterball urinals and cop cosplay of “Outside.”