OK I just looked at the topshop site, but here's my thoughts on how you should "work" these items:-
Skinny white jeans are a very fitted look, so I think you should choose a top that's also quite fitted (if you were to put something flouncey or girly - like one of summers' gypsy tops with this - you would create a very unbalanced silhouette)
I think with these jeans and shoes you can either do something which is quite an 80's influenced look - stripes, angular tops, long t-shirts - or a kinda "classic americana" 1950s-ish look: retro fitted shirts, etc.
Colourwise, either stick to your monochrome black and white - perhaps with a pattern - or pick another single strong colour to contrast if you're doing the more "eighties" idea.
If you decide to do a little fitted shirt with your jeans and wedges, team this with a high ponytail, a minimal eye, and a bright cherry coloured lip for the "classic americana" look.
If you decide to do the more "eighties" type of look, pick a long, eyecatching vest-style top, team with "big" hair, black eyeliner, lipgloss and big chunky jewellry: thick belts, co-ordinating bracelets, large hoop earrings, etc.
Some tops that would work with these looks:
Day or evening:
http://www.topshop.com/webapp/wcs/st... 384&langId=-1
http://www.topshop.com/webapp/wcs/st... 116&langId=-1
http://www.topshop.com/webapp/wcs/st... 626&langId=-1
http://www.topshop.com/webapp/wcs/st... 222&langId=-1
http://www.topshop.com/webapp/wcs/st... 727&langId=-1
http://www.topshop.com/webapp/wcs/st... 753&langId=-1
http://www.topshop.com/webapp/wcs/st... 817&langId=-1
Evening:
http://www.topshop.com/webapp/wcs/st... 057&langId=-1