Beauty tutorials on YouTube go back further than most people think. Michelle Phan's Lady Gaga-inspired look was one of the platform's first true viral makeup tutorials, years before NikkieTutorials' "The Power of Makeup" redefined what a beauty video could say about self-expression, and long before today's rapid-fire "testing viral makeup trends" format took over. Which era of beauty content actually taught you (or entertained you) the most?