Binding question concatenating a string literal with eval

Trying to concatenate a string literal with a eval statement for a label in my datalist itemtemplate:

<
asp:label runat="server" id="lblPosted"  text='POSTED ON: <%# eval("TopicPosted") %>' />
works fine and properly shows the date posted if I remove the POSTED ON: above

If I run it as above, get ONLY the POSTED ON: ...