As you know, I'm a fan of makeup brushes. Especially when you're applying eye shadow, having the right one can improve your application and precision. If you haven't read my guide to brushes, check it out to see what different styles can do for you.

A good way to build your collection of brushes is with all-in-one set, like this croc-print pop-up kit ($45). If you're new to brushes, I recommend starting out with a set because it allows you to see how different shapes work. So for this week's Beauty Mark It challenge, let's all search for great makeup brush sets. You can share your favorites by tagging your choices with the phrase "Brush set." I'll feature the readers' favorites on BellaSugar next Tuesday, November 6.

To learn about Beauty Mark It challenges and to see how to add your picks, click here. To see some of my favorite online beauty stores, read more

Saks Beauty Place
Victoria's Secret Beauty
Sephora
Drugstore.com
Fred Segal Beauty
Folica
Strawberrynet.com
Nordstrom
Bergdorf Goodman
Beauty.com