Countdown to London: 20 days!

So im going to Londin in 20 days with my classmates, and I cant wait.
I have planned my shopping trip and made a list so im ready to go!


Its my first visit to London and im still not shure if I have all the must-see places on my map, so it would be nice if anyone know a store or a public place that they would recommend to me?
xoxo Stephanie