What: Abba Pure Shine Drops ($16)
Why: What’s bright, bouncy and head-turning? If you guessed Swedish disco supergroup ABBA, you’re… kind of right, as far as the name goes, anyway. The real answer is: your hair after a quick smooth-through of Abba Pure Shine Drops. A tiny drop of this shine serum goes a long way towards busting brittle strands and infusing even the most winter-worn locks with spring and sparkle. Abba’s game is natural beauty, so you won’t find any parabens, dyes or sulfates (it’s 100 percent Vegan, too). The stuff may not transform you into an insta-disco queen, but it will make your hair glisten—an effect you might actually prefer.