First, Amazon.com
Second, you may also want to check out the following deals:
1.Allurez.com

2.Beyond the Rack is also putting on great deals for the holiday season. This Holiday Season Shop Women's Designer Brands & Save Up to 80% Off at BeyondtheRack.com! Invitation Code: HOLIDAY2012
3. Charm & Chain

4. Leonisa.com is a well-known online retailer selling lingerie, shapewear and stylish swimwear. Click to enjoy the Cyber Monday Sale - $10 Off Orders of $100+, $25 Off Orders of $150+, $45 Off Orders of $250+ from Leonisa!

5. Manhattanite

6. Marissa Collections
7. You've worked hard all year. You deserve to have a nice vacation, as well as some rest and relaxation. Why not book a vacation with OneTravel? You can Plan your getaway with OneTravel Vacation Packages! Save up to 55% & Get Additional $60* Off by using Promo Code OV60. Book Now!
8. REEDS Jewelers

9. Roots Canada is also having a Cyber Monday sale. Click here to see the Black Friday & Cyber Monday Sale at Roots! 25% Off* Everything + Free Shipping

10. STYLEBOP.com

11. The Body Shop

12. World Jewels is another online jewelry retailer. If you want to treat yourself to some nice jewelry, there is a good chance that you will find something that suits your budget. You can Shop by Your Price Range at WorldJewels.com! Under $200 to over $3000! The largest selection, variety and custom options! Free Shipping & Engraving! Shop Now!

I hope you enjoy your Cyber Monday shopping! :)
Yes, these are affiliate links.