If there is a Baton Rouge AL, I doubt Elton John has ever played there
LA. The article clearly states LA. LA is the abbreviation for Louisiana. Where you did you see AL? He did have a rally in Baton Rouge, LA back in Feb of this year. The rally was not recently. And, yes his February Rally there had a very large attendance.
There is nothing bogus about the article but the fact it seems to be a rally of several months ago. However, this in no way discounts the massive crowds who seem to be drawn to the venue when he speaks.