These Are the 17 Best Beauty Trends That Ruled in 2015

While we can't exactly pinpoint where the term "on fleek" originated, there's no piece of slang that better speaks to 2015 — and to this year's beauty trends. This year saw this description used for pretty much everything, though it is popularly used to describe brows that are sleek, groomed, and the embodiment of perfection. For those concerned with getting arches "on fleek" (or what that even means), rely on Queenii Rozenblad's video. In it, she explains how to use pencil, concealer, brow gel, and foundation to step up your arch game.