dynamic page tile and null values

I'm using this code on the "Page_Load" code-behind to make the page tilte:
            Label lblProdcucer = (Label)fvAdditionalInformation.FindControl("Label1");
            Label lblItemName = (Label)fvAdditionalInformation.FindControl("Label3");
           
Page.Title = string.Concat("Now Viewing: Item Information", " >",
" ", lblProdcucer.Text, " ", lblItemName.Text);   

 
This
works great if I'm viewing a page that has information for
the "label1 and Lable3" to display.  But what If there isn't  anything
in the database for either of these (null values) it will error with: "System.NullReferenceException: Object referen ...