Ricky Martin hasn't stopped livin' la vida loca, you guys. And Shania Twain is still the one. That's according to this year's Billboard Music Awards, where stars partied like it's 1999. Other throwback favorites in the house include Fred Durst and Winnie Cooper herself, aka actress Danica McKellar. Get nostalgic when you keep scrolling. And while you remember Ricky Martin most from the '90s, he kept things relevant, if not appropriate, Sunday by holding up a sign with the hashtag #BringBackOurGirls, referring to the kidnapped young women in Nigeria.