M.L.
Okay, I'm a crafter and an interior design blogger. So I see where you are going with this.
You can stamp pink lilies on teh lamo shade. Or make them out of felt or paper, or buy fabric ones and hot glue them on.
http://www.etsy.com/search/supplies?search_submit=&q=...
stamps:
http://www.etsy.com/search/supplies?search_submit=&q=...
How to make the lampshade with glued on flowers:
http://howtonestforless.com/2011/11/21/anthropologie-knoc...
I wouldn't mess with the water/oil... it can get dusty, stagnant and gross looking/smelling. Perhaps putting a cute, plush lily pad or frog in there would be adorable.
For adding pink, you could use pink wallpaper, scrapbook paper or paint to line the back of the bookshelves.... like this:
http://www.chiccheapnursery.com/2011/design-advice/rock-s...