Add Post Tags to Body Class

Want to add post tag name to body class – I am successful in using the code below to add category to body class –

 //adds new body class for post category
add_filter('body_class', 'add_category_class_single');
function add_category_class_single($classes){
     global $post;

    $category = get_the_category($post->ID);
    $slug = $category[0]->slug;
    $classes[] = 'post-category-' . $slug;

    return $classes;
 }

however when i try to use get_the_tags i am not having any luck – any ideas?