Now: Brows are nicely filled in, which makes her eyes pop.
Images: Getty Images
Photo 12/17
Celine Dion
Then: There's some definition, but these brows are still very thick and dark. Not to mention way too far apart.
After: Thinned, lightened and filled in the middle for a look that's way less harsh.
Images: Getty Images
Photo 13/17
Jennifer Lawrence
Then: A good start, but it seems like these brows haven't been filled in at all.
Now: There we go. Slightly darker, fuller brows make the rest of her facial features pop.
Images: Getty Images
Photo 14/17
Chloe Kardashian
Then: Good arch, but the brow hairs themselves are a bit short, and get superskinny at the ends.
Now: Fuller and more flattering -- the brows starts further toward the nose and don't thin out so much at the ends.
Images: Getty Images
Photo 15/17
Rihanna
Then: The brows are too far apart and curl under at the far end -- a very unnatural shape.
Now: The arch is wider and softer, and the brow is better filled in overall. Phew.
Images: Getty Images
Brows are always at the center of the beauty conversation. The ever-evolving trends breed "brow gurus" like Anastasia and Benefit, as well as new tweezing, waxing and futuristic brow-building technology all the time. Why? Because brows make the single biggest difference in how we look.
"Eyebrows are the most important thing on a woman's face," says celebrity makeup artist Victoria Duke. "They set the stage for our expressions, which have a huge impact on how we look." Examples? "Really thin eyebrows can make you look older" Duke continues, "a strong arch makes you look more confident; a full, soft brow makes you look youthful.... Shape and color matter."
Not everyone nails the perfect brow, however -- celebrities included. Duke says some of the worst celebrity brows of the moment include Nikki Minaj's over-exaggerated brows, Demi Lovato's thin, harshly shaped ones and Kate Middleton's shapeless brows.
But there is hope for recovery from unfortunate arches. Keep clicking to see which of your favorite celebrities have finally mastered their perfect brow. Sometimes, it takes a lifetime. Here, the famous faces that made it happen in 2015.
