When the tiniest thong you can buy still shows under some of you most beautifull clothing, a new one comes along that might just be the solution solving this issue forever.
The C-String hold in place by itself and seems to be completely invisible or at least incredibly discreet. It just might not be as beautifull when made visible.
Great success in the United States, its even recomended as a tanning accesory, ideal for the perfect tan. If you dare it.
You can get one for yourself for 22€ there : http://www.lovehoney.co.uk/product.cfm?p=11481&cs=EUR