Room decoration help?!?!?

So, I am a teenage girl wishing to do up my room exactly like this:

http://www.roomzaar.com/rate-my-space/Girls-Rooms/...

I have already picked out the exact furniture in that room, so the furniture will all be the same. It's storage and decor that I need a bit of help with.

Firstly if your going to suggest something please make it co-ordinate with the room design. Also, it would be helpful if you could list things such as cushions, storage (that's cute, and not tacky or that is in clear sight I want to keep the room looking uncluttered. I have quite alot of stuff so thats why I need the extra storage) ornaments, just in general cute little decorations that add a bit of sophistication to the room. I don't really want anything bold (if you see the room you'll know why, haha) just simple and classy. I just want to have a "clean" feel. Also, if your going to list sites or stores please make them british as I live in the UK.

All answers are greatly appreciated, and hopefully you might have an idea from the room I listed. Thanks in advance.