This year is a big one for pop culture anniversaries, and one of the biggest is this week. Friends turns 10 on May 6, 2014 — but that's the anniversary of its finale! The show started two decades ago in 1994, and Ross's son, Ben, would be almost 20 now. Yeah, we're old. Additionally, some of our favorite albums from the '90s turn 15 this year — including Britney Spears's . . . Baby One More Time and Christina Aguilera's divalicious debut — and many killer teen movies do too. While exciting, it's not all sweet nostalgic feelings — it forces us to look at just how long it's been since those good old days. Keep reading to see 25 mind-blowing pop culture facts that will make you feel ancient, from the demise of YM magazine and other 2000s trends to exactly how long ago Mary-Kate and Ashley Olsen made a splash in matching outfits.