Hey Alicia, I know you probably don't read all this, but I'll write it anyway, just to get it of my chest.
I've liked you and your music ever since Songs in A minor came out. I have failed to see you live in Belgium the last two times you were here, so I was determined to see you live this time. And I did! I enjoyed it incredibly much, I was completely stunned !! It was a great show and of course the music was ... well, FABULOUS!! Your backing vocals and band are really good too! In the end, I was singing No One so loud (and false too, probably), people started looking at me like I was some friggin' nutcase (I don't blame them though, I can look (and sound) weird when I completely loose it/myself). But so what, you don't get to see Alicia Keys (a)live and kicking every day, do you ?!
I've been playing the piano myself for 10 years, so I think I can say (without sounding too conceited, hopefully) that I really understand how hard it is (or would be for people less talented than you ) to perform the way you do. How you work that piano is amazing, you play it so fine and light, really... elegant! I would give the world to be able to play like that !
Please make sure you don't skip Belgium on your next tour!