I remember one girl in my 1st grade class with pierced ears, most likely done by the needle and cork method based on what she wore for earrings. No one really paid much attention to her ears then. That was back in 1970-1. I would say that pierced ears for young girls started to become popular in the Northeast US around 1975 or so, since that is when I remember many of my sixth grade classmates started wearing earrings (just about every girl got her ears pierced with small gold-ball earrings then).
The first time I saw anyone with a double-pierced ear was in 1977, when one girl in my class had her left ear pierced again. It looked strange to me at that time to see 2 earrings in one ear! Soon after another girl had both ears pierced for a second time, but it really didn't become popular in my school right away, I didn't notice too many other girls with "extra" earrings until the next year and triple-piercing wasn't common until a few years later and even then not many girls did it.











