To quote the site itself:
Audio clips from online dictionaries sing the hits of yesterday and today. The fun of karaoke meets the word power of the dictionary.
“Insights Into TEFL” highlights the Dictionaraoke version of James Brown’s “I Feel Good” as an example. (Oops, I don’t really know why you can’t hear the song when you click on the link in this post. However, if you go to Dictionaraoke’s main page you can access all their songs, including this one).