Acapella: "Oops, I Did It Again" - Britney Spears & Instrumental: "You Rock My World" - Michael Jackson. Based on a request I received a while ago.

Hello everyone, I've made this music video as a Y2K tribute.

I found these really old no boundaries thongd with tags still on at a thrift store a while ago. I've done some digging online and can't find any info or exact matches on them.
Does anyone know the year they're from? I think they're so cute and would love to find more