I love studs. I have a pair of sandals with spikes and studs on the back. I always get compliments on them and I love them. I realize a few years from now, I will see pictures of myself in them and gawk at the trend I am currently embracing. They do add a fun element to apparel so for a one-time promotion geared toward teens, they'll be a hit.
As you embark on trendy apparel selling, remember it is always better to go with a toned down version of a trend, like a blouse with sheer sleeves not entire shirt front. Keep it somewhat classic and you'll survive the ever-changing preferences of fashionistas.