As Keith Olbermann said, it (http://en.wikipedia.org/wiki/My_Box_in_a_Box) is a parody in response to a parody in response to those lame-ass banal boy-band crap songs. Keith's way of commenting on the way it (and its predecessor) went viral is funny:
http://www.youtube.com/watch?v=h3zad0JJYYI
Keith's follow-up a bit later:
http://www.youtube.com/watch?v=ec3wgEkEdPo
^ From the website for "Bunny": http://myboxinabox.typepad.com/
And if you haven't seen it, it's easy to find the original SNL bit on Youtube, or the NBC website of course. Seeing Justin Timberlake parody himself almost makes up for The Superbowl Incident (last year on my birthday, no less!)