Not really. I pay about the same for most of my underwear, and it's all very pretty and girly. No one would ever guess that almost all of my undies cost me less than $5 apiece, lol. My style/cost preferences are the same regardless of what royals/celebrities do.
I will continue to pay however much it costs to have comfortable underwear. Though now that I'm considering it. I don't think I've ever paid more than $4.00 for underwear. Bras on the other hand. Those suckers are expensive.