One word: breathtaking.
Though the neckline truly epitomises the meaning of "plunging," Ms Keys pulled it off looking absolutely stunning and not skanky. I know it sounds corny, but for serious, I couldn't take my eyes off of the gorgeous Ms Keys!
And, of course, the little impromptu delight that she did with Stevie Wonder was just the perfect icing on the cake, indeed.
I LOVE YOU, ALICIA KEYS! ;)