Shania Twain, then Selena Gomez. more recently, i found Lana during the Video Games hype, so I guess she's the first I've stanned when I got older.
ETA: i remember very clearly me going to Target like once a year or so, and i'd always get the new selena album.
this was obviously before i knew artists like announce albums and release dates, so i always had "new" selena music. i alsssooo remember looking up when Kiss n Tell was gonna come out, and i went after school with my dad to go get it. lmaaooo