email to multiple users from SP workflow

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How to insert multiple person/group field contents into CC portion of workflow email

Issue:  You want to be able to pull the values contained in a multiple person/group field in a SharePoint list into a workflow, and insert them into the CC portion of the send email workflow action.
A most brilliant colleague of mine was able to find a quick and easy workaround for this pesky issue.
In this scenario, the users to be CC'd are contained in a multiple person/group field in the list that the workflow is running on, called 'Assigned To Secondary'
To solve the problem:

1. set workflow var:SecondaryAssigned to CurrentItem:Assigned To Secondary (formatted as a string)
2. if workflow var:SecondaryAssigned is not empty
3. set workflow var:SecondaryAssignedAddr to workflow var:SecondaryAssigned (formatted as email address, semicolon delimited)
4. send email
5. in the CC portion, select workflow var:SecondaryAssignedAddr (formatted as a string)

Hope that helps...!

http://geekswithblogs.net/DinoGrl/archive/2012/04/24/sharepoint-2010-how-to-insert-multiple-persongroup-field-contents-into.aspx