This plugin is nothing more than a singe widget that displays your top posts in the sidebar.
It is based on <a href="https://wordpress.org/extend/plugins/stats/" rel="ugc">WordPress.com Stats</a>, so it does not include its own statistics system.
You need the above plugin for this to work!

WordPress.com Stats: Top Posts Widget

This plugin adds a sidebar widget, that is an excerpt of the 'Top Posts' section on the Wordpress Dashboard.

rezehnde

Show a top 10 list from your popular blog posts easily.
This plugin is dedicated to Sara Miranda Rezende, my lovely daughter.
<h3>How to use</h3>
Put this custom tag inside posts, pages or widgets in order to show a top 10 list from your posts:
[top10posts] to show a top 10 list of posts of current year and current month 
[top10posts year=2009] to show a top 10 list of posts of year 2009 and current month 
[top10posts year=2009 month=NULL] to show a top 10 list of posts of year 2009 and all months 
[top10posts year=NULL month=NULL] to show a top 10 list of posts from all the time

WordPress.com Stats: Top Posts Widget vs Top 10 Posts