I just caught a bit of Charlie Sykes discussing - with my wife - the viral video in which a wedding party dances up the aisle to Chris Brown's "Forever." Charlie seemed surprised that she liked it and expressed some certainty that I wouldn't want to do it. I'm not so sure. I certainly wouldn't have somersaulted. In any event, I am skeptical that I would have done it well.
Some commenters thought the entrance inappropriate - particularly if one views marriage as a sacrament.
If a sacrament is a sign or manifestation of God's love and grace in the world, then it seems to me that joy is an appropriate response. The end of the video - with the bride dancing into her future - was one of the more joyful things I've seen lately.
While I suppose that one could object to the secular nature of the music, a lot of wedding marches express no religious sentiment and the objection presupposes a duality that is decidedly non-Catholic.
On the other hand, I suspect that most wedding parties will do it poorly. While not all of the members of this party could dance, the surprise and aura (if not the fact) of spontaneity absolved them. That won't happen if this becomes a not unusual thing.