The green dress or "Jenny From the Block" made her an icon. I was a big music fan at the time and didn't even hear about the Versace dress in 2001...yet found out about it in 2012 when someone else mentioned it. It left a big impact for her image.
with J-Lo I feel like she is an Icon on the verge of legendhood. I feel like had she had 1 more strong era we could of easily dubbed her a legend. but she has had huge pop culture moments. she was the IT girl in terms of fame, music and fashion from like 2000 to 2004 ish.