http://www.clinique.com/landing/bridalbeauty

and download the widget (scroll down, the download button is on the left); it looks like it only works for PC, but it does work for Macs too. When you install the widget, an envelope appears, and when you click it a form comes up that you fill out to get a free 2 week supply of mascara.

For the sake of completeness, just fyi a link to this offer can be found here:
www.clinique.brides.com/

where it says:

“Clinique’s NEW Lash Power Mascara vows to look pretty through rain, sweat, humidity and tears, but don’t just take our word for it.
Show us how Lash Power Mascara lets you enjoy EVERY moment as you prepare to walk down the aisle without worrying about smudges or smears. Download our Bridal Beauty Countdown widget to get your FREE Lash Power Mascara try-on”

To remove the widget from your PC
Go to START,
Choose Control Panel
Choose Add Or Remove Programs
Click on Bridal Beauty Countdown
Click on Remove to uninstall.

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