This week's top beauty web sales: NARS, Tarte, Butter London

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Organic cosmetics at The Fairest, skincare at The Skinny and free holiday shipping -- all here in this week's beauty sales.

Organic cosmetics at The Fairest, skincare at The Skinny and free holiday shipping - all here in this week's beauty sales.

The Fairest

Stock up for your home manicure with Butter London, get red lipstick for one of the key make-up looks this winter from Mojo Cosmetics, or go 'all natural' with products from Cake Beauty, Peacekeeper, or Juara.

Site: thefairest.com

NARS

Celebrating its 15th anniversary this month, NARS is offering complimentary shipping for purchases worth €75 or over through December 6. Its special-edition 'Wild at Heart' and 'Everlasting Love' palettes have been released on the occasion.

Site: narscosmetics.com

Aveda

Even better deals at Aveda: during holiday season, the label offers free shipping with all orders. Enter the code 'HOLIDAY9' at check-out.

Site: aveda.com

Tarte

The cosmetics brand is hosting a sale of its eco-friendly cheek stains, lip glosses, eyeshadows and -liners on the Gilt sample sale site from November 23.

Site: gilt.com

FUNCTIONALAB

Fashion-focused sample sale site, Editor's Closet, is again hosting a beauty sale this week, this time offering the skincare products by Functionalab.

Site: editorscloset.com

Sephora

Online shoppers will get a free Clinique lip gloss with orders worth $25 or more if they enter the code 'GLOSSWEAR' at check-out. Available to US customers only.

Site: sephora.com

The Skinny

One of the newest sample sale sites around, The Skinny features just one boutique this week: Duchess Marden skincare is available at discounted prices through November 25.

Site: shoptheskinny.com