Popsugar Celebrity Grey's Anatomy Pop Culture Facts That Will Make You Feel Old November 30, 2014 by Alyse Whitney View On One Page Photo 16 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 16 Clarissa Explains It All started 23 years ago. This GIF explains how we feel about it. Source: Nickelodeon Previous Next Start Slideshow Grey's AnatomySarah Jessica ParkerBritney SpearsAshley OlsenMary-Kate OlsenNostalgiaFriends