OK, so ignore the Justin Beiber part of the title of this article and read it any way. Besides Justin is supposed to be for young kids, so why get all worked up about him being kiddish anyway? If you aren't his age, why should you be worrying about what he puts in his videos?
Besides Sugarland already beat him to it in terms of making a video where the steampunk was blatantly just randomly tossed in to try to steam up something lame for purely commercial purposes. Just so you know, the Steampunk community is not really opposed to steampunking a music video if some effort is made to make the video actually focus on steampunk concepts rather than simply a mindless decoration of the set and a poor attempt at costuming while doing totally irrelevant, (and rather boring) music. Boring and Steampunk just don't mix well. Sorry.
The point of this fine article by USA Today is that Steampunk is infiltrating pretty much everything now! Some people like that and some don't, but few are still fully in denial about it. In true steampunk fashion though, if they don't like some aspect of a thing that has good parts in it, the steampunk inventors and crafters simply take it apart and rebuild it. It seems they even did this with young Master Bieber's steampunk music video. Your path to this world where we really can change whatever annoys us and turn it into amusing art in the process awaits below: