How's this for a #TBT? As we wrap up InStyle's 20th anniversary year, we're taking a look waaaay back at our star-studded cover archive. We teamed up with Culturalist.com, a site that lets you create and share top ten lists on a range of pop culture topics, for a look back at our cover collection, and we want you to join the conversation. Take a peek at all of our covers, then make your own top ten lineup and share it on Twitter and Facebook. Need some inspiration? Check out InStyle editor Ariel Foxman's picks here. Now go ahead--play favorites!