Change jQuery function to use elements inside DIV instead...

How can I change the attached code to, instead of using variables from "data," use all <p> elements that it finds in the DIV.  For instance, I want one <p> element to fade in, then fade out, and then the next <p> fades in and out, and so on.  Here's the HTML:

<div id="reviews">
<p>This should fade in first and then fade out</p>
<p>This should fade in once the first one fades out and so on...</p>
</div>

$(document).ready(function () {    
var data = {
    reviews: [
        {
            review: "It was okay..."
        },
        {
            review: "Poor, 0 stars"
        },
        {
            review: "Beyond Excellent, 10 stars!"
        }
    ]
};

$.each(data.reviews,function(i,itemData){
    var p = $('<p>').text('"'+itemData.review+'"');
    if (i == 0) p.addClass('active');
    else p.css({opacity: 0.0});
    $('#reviews').append(p);
});

function showNextReview() {
    var $active = $('#reviews p.active');
    if ( $active.length == 0 ) $active = $('#reviews p:last');
    var $next =  $active.next().length ? $active.next() : $('#reviews p:first');

    $active.removeClass('active').animate({opacity: 0.0}, 1000, function(){
        $active.hide();
        $next.show().addClass('active').animate({opacity: 1.0}, 1000);
    });
}

setInterval(showNextReview, 5000 ); 
});