Clogs? Abre I'm guessing you guys/gals in America refer to G-strings as thongs. Like tight underwear. But lets not go there.
I think thongs (as in flipflops) look great! They suite some people better than others but they shouldn't be worn to formal events I think. I don't really see a problem coming to church like that. Jesus accepts us as we are. But we also shouldn't dress badly by concious decision.