What is the address to mail your money to join the fan club? Thanks!

Briana,I think the best thing to do is contact Amber.I checked at My Control Panel and it said if you have any questions about it ask the administrator

Do you know how long it usually takes for her to reply?

Try this:
Go to this page http://www.vincegill.com/membership/signup.php
choose 'off-line payment' then fill in the info, click on Continue at the bottom and see if an address comes up.