[jQuery] Simple FadeIn with Appending

[WhoButSB]

Hello all,
I have a really simple question but, and once I figure out this little
hurdle I know I will be able to work on a lot more stuff.

I would like to add a simple notification to fade in when some one
presses a button but I would like to attach the notification after a
label.  I know I have to be really close with this code I just can't
figure it out.

$(function(){
        $('#button').click(function(){
                $("#fieldValue label").fadeIn('slow', function (){
                        $(this).after("<span class='field-error'>You need to 
enter a "
+fieldName+" here.</span>");
                });
        });
});

Thanks for your help!