title: Displaying most popular post on Tumblr blog
body: <p>I've been tasked with adding "Most Popular" functionality to a Tumblr blog. Essentially, when the Most Popular button is clicked, I need to display either a single post, or a list of posts, ordered by their popularity. The popularity will be calculated based on the number of "notes" that the post has.</p>
  
  <p>Does anyone have a suggestion on the best way to go about this? I can't find anything baked into their theme customization at <a href="http://www.tumblr.com/docs/en/custom_themes#search" rel="nofollow">http://www.tumblr.com/docs/en/custom_themes#search</a>. Is going the API route the only way to accomplish such?</p>