If you were hitting the road to Lafayette tonight to see Journey at the Cajundome, save the gas -- the band has cancelled the concert.  Not postponed, but cancelled.  The reason?  Vocalist Arnel Pineda has been forced off stage by his doctors for the next month.  Yikes.So, if you bought tickets by credit card, worry not -- your account will be credited, according to our friends at KTDY in Lafayette. If you bought with cash, you'll need to return to the place where you purchased your tickets to get a refund.  That's a tough blow for Journey fans -- and fans of Night Ranger and Loverboy, who were also slated for the show.  Still, our best goes out to Arnel for a swift recovery.