Above image from Yikes Machine
Given your obvious love of bright contrasting colour, my first suggestion is an ornate mirror painted in a fun colour, such as pink or yellow. If you don’t like ornate mirrors, a simple mirror with a wide frame would look just as effective. You can probably find something appropriate at a second-hand store and you won’t need much paint.
Above image from House to Home
Above image from Living Etc
To replace the LACK shelf, a narrow wall-hung unit with little drawers built-in underneath would be perfect. This Ledge unit from UrbanCase can be ordered in MDF painted any colour you like and it includes a place to store and easily access your laptop. It’s ridiculously expensive, but you could look around for something similar.
Above images from UrbanCase
Alternatively, if your handy enough to DIY (or you have a handy friend or relative kind enough to help), you could make something similar to this desk.
Above image from Design Sponge
I would recommend painting it white and making the built-in storage underneath wide enough to fit some boxes to store your girlie stuff. Some nice looking DVD storage boxes could be ideal if you want more deep square storage. Also, Pantone coloured tins could be fun for storing larger items.
Above image from The Holding Company
That’s the basics covered, now to inject a little more of your personality into the space.
On the black wall, you could add some simple white hooks to display some of your statement necklaces.
Above image from From Scandinavia with Love
Or a mini moodboard (you could include those cute photo booth snaps). This one is just a strip of hot pink metal with discrete little magnets to hold the pictures in place.
Above image from French by Design
Alternatively, you could prop those photos and some cute pictures or postcards around the mirror.
Above image from Automatism
Above image from Dress Design Decor
I love these MIEN storage boxes. Yes, they’re from IKEA, but they’re actually quite cute and easily customisable with some paint or pretty paper and they hold a lot of stuff (the squarish one is great for storing my chunky beaded jewellery).
Above images from IKEA
And although it looks nice and tidy to have most of your stuff packed away, you could display some of your more favourite pieces in an interesting manner.
Above image from Bodie and Fou
That’s all I’ve got. I hope I have managed to provide you with at least a little inspiration. Even if I haven’t, that was kind of fun.