[jQuery] Easy Fade in Problem...

Anyone know why it's not fading in the content? It's fully functional,
but it just doesn't "fadeIn"..

function addPerson() {

     //current keeps track of how many people we have.
     var strToAdd = '<div id="input" class="ideaInput"><input
name="idea[]" class="idea" type="text"/>'
     strToAdd += '<textarea name="description[]" class="description"></
textarea></div>'

     $('#all-inputs').append(strToAdd);
};


$(document).ready(function() {
     $('#btnAdd').click(function () {
          $(addPerson).fadeIn('slow')
     });
});



I apologize if this isn't the correct place to post this type of
issue. It seems like this would be a great resource.