Mirko Gozzoli & Alessia Betti Quickstep WSS 2006 (enhanced) 

Mirko Gozzoli & Alessia Betti Quickstep WSS 2006 (enhanced and extended)
Name of the song is "Mack The Knife" with Michael Buble w/ voiceover by Frank Sinatra
Mirko & Alessia are the fastest couple ever to become World Standard Ballroom Champions. After turning pro in 2004, they quickly became World Champions the very next year. As the current title holders, it doesn't seem like any other couple has the ability to relinquish the titles from them anytime soon