How can I decorate my room?

So Im scene which means I like hello kitty tweety bird and tacky stuff like that I also like madeline Monroe and those kind of things I am painting my room black and then adding loads of pink and blue and bright colors onto it, but the problem is that I have lots of red and yellow stuff that don't go with my room but I can't throw them out because I still like them what should I do and are there any good websites for room styling? Thank you :) x