Claire's is THE place for cheap jewelry and I'm not just talking about the prices. Yes, this place is a depot for fun costume pieces. You'll find a huge selection of earrings and necklaces and also some bracelets, rings and body jewelry. There always seems to be some promotion going on, usually something like buy 2 get 1 free. I've purchased cute hoop earrings in all different sizes here. I usually end up losing one or both earrings so I don't feel so bad when I've purchased them at the low Claire's price. Prices are around $5 for earrings so you obviously can't expect very high quality. Still, they always have lots of fun and funky pieces. For Halloween they have spider/web or pumpkin earrings and even some costume accessories (like devil horns, tail & pitchfork).
They also pierce ears here. My mom had it done there a few years ago and was very pleased...I believe it was free with the purchase of a pair of earrings from a predetermined selection.