Claire's Stores, Inc. is the world's leading mall-based retailer specializing in one-stop shopping for teens' accessories and apparel and currently operates approximately 3,072 stores throughout the United States, the Caribbean, Canada, Japan, United Kingdom, Switzerland, Austria, Germany and France. Claire's has 3 store concepts: Claire's Accessories, Afterthoughts and Mr. Rags. Claire's is also the largest piercer of ears in North America.
from my personal experience:
this is the place where I, and every guy for whom I know where they got their one or more ear piercings, got their ear(s) pierced, so while I can't vouch for their claim of being "the largest piercer of ears in North America", I can say that they have pierced a large percentage of my friends' ears...