Find out which products Birchbox founder Katia can't live without
After three years at the helm of Birchbox, it's safe to say Katia knows her stuff when it comes to beauty. Taking full advantage of her guest editorship, we asked Katia to share her favorite products -- the ones she's discovered along the way and just can't live without. From her favorite mascara to the ultimate nude nail polish, we've got the scoop right here.
Click through the gallery to see Katia's beauty essentials!