Multiiste Blog creation alert email with passwords

Hi, I have a store project that we are using multisite for. Vendors sign up and make a sub site for themselves as a staging ground and then we migrate over products into the real store.

We would like to have the site admin or another in company person receive a duplicate email with the successful sign up message that we created in the multisite settings page.

How can we achieve this? We do not want the admin to be the site owner. Just recieve a CC of the sign up email alert that contains the welcome and login in info.

Also the sign up function is controlled by a Gravity Forms.

You can test out what I mean on - the second page is password protected
password is: harry&tess

Thanks for your thoughts.