Master Page and Web Content Form Question

Hello everyone,

I am using Master page and Web content page for my web app.  I created two labels (lblUserName and lblEmailAddress)
on the Master.Header page.  I want to pass the value of these labels to lblUserName1 and lblEmailAddress1 on the Web content page 
when it's loaded.

Would someone please give me some advice on how to achieve this.

Any advice is greatly appreciated!

Thanks,