List all posts from specific category ordered by access count via shortcode

right now it can fetch featured image but for posts related to the category without a featured image its fetching the a featured image from the very first post which is in a different category..
here the current code:

function tptn_shortcode_songreviews( $atts, $content = null ) {
	if ( function_exists( 'get_tptn_pop_posts' ) ) {

		$list ='';
        $settings = array(
                'daily' => TRUE,
                'daily_range' => 7,
                'limit' => 3,
                'strict_limit' => FALSE,
        );

		$topposts = get_tptn_pop_posts( $settings ); // Array of posts

		$topposts = wp_list_pluck( $topposts, 'postnumber' );

		$args = array(
			'post__in' => $topposts,
			'orderby' => 'post__in',
			'post_type' => 'post',
			'cat' => '5',
			'posts_per_page' => '3',
		);

		$my_query = new WP_Query( $args );
		if ( $my_query->have_posts() ) {
			$list = '<ul class="top-pick">';
			while ( $my_query->have_posts() ) {
				$my_query->the_post();
				$list = $list. '<li><a href="' . get_permalink( get_the_ID() ) . '" class="topp-img-container">';
                $list = $list.
                    tptn_get_the_post_thumbnail( array(
						'postid' => get_the_id,
						//'thumb_height' => '45',
						//'thumb_width' => '45',
						'thumb_meta' => $thumb_meta,
						'thumb_html' => $thumb_html,
						'thumb_default' => $thumb_default,
						'thumb_default_show' => $thumb_default_show,
						'scan_images' => $scan_images,
						'class' => "tptn_thumb topp-img img-responsive",
					) ); //thumbnail

                $list = $list.'</a>';
                $list = $list. '<span class="topp-title"><a href="' . get_permalink( get_the_ID() ) . '">' . get_the_title() . '</a></span></li>';
				wp_reset_postdata();
			}
			$list = $list . '</ul>';
		} else {
            echo "no top picks yet";
		}
		wp_reset_query();
		return $list;
	}
}
add_shortcode( 'tptn_list_songreviews', 'tptn_shortcode_songreviews' );

—————
as for the numbering currently using css counters so that i can style it more

hi,
showing of featured images yes But those without featured images doesn’t use the default placeholder thumbnail instead it fetches my first upload in my media library..
middle one in this pic is has a featured image set up while the rest isnt.
http://i57.tinypic.com/snfd04.png

well its not getting the first image of the post because I haven’t set any instead its getting my first upload in my wordpress media library.
http://i57.tinypic.com/kcdwnt.png

code output of no featured post set

<li>
<a href="http://indiecore/2015/06/18/song-review-alpha-betas-newest-single-title/" class="topp-img-container">
<img src="http://indiecore/wp-content/uploads/2015/06/cgdrawing-e1434519307675-320x175.png" alt="" title="" width="150" height="150" class="tptn_thumb topp-img img-responsive tptn_firstchild"></a>
<span class="topp-title">
<a href="http://indiecore/2015/06/18/song-review-alpha-betas-newest-single-title/">song review alpha beta’s: newest single title</a>
</span>
</li>

I have set a different placeholder image in your top10 settings

its attached to hello world posts which is the wordpress 1st posts. which is still under uncategorized. the category i set this code is 3 which is called ‘song reviews’