Blogger widget type PopularPosts get blog post id

# Will not show ID
<b:section id='hp_popular_posts' showaddelement='no'>
  <b:widget id='PopularPosts1' locked='true' title='Popular Posts' type='PopularPosts'>
    <b:includable id='main'>
      <b:loop values='data:posts' var='post'>
        ID = <data:post.id/> - Title = <data:post.title/><br />
      </b:loop>
    </b:includable>
  </b:widget>
</b:section>

# Will show ID
<b:section id='hp_popular_posts' showaddelement='no'>
  <b:widget id='PopularPosts1' locked='true' title='Popular Posts' type='PopularPosts' showaddelement='no'>
    <b:includable id='main'>
      <b:loop values='data:posts' var='post'>
        ID = <data:post.id/> - Title = <data:post.title/><br />
      </b:loop>
    </b:includable>
  </b:widget>
</b:section>