I recently came across an article in Mashable about Corona Light's new campaign whereby people can use a Facebook App to upload a picture of themselves to a Times Square billboard. This recent campaign by Corona Light is in my opinion, an excellent example of how to use a joined up marketing approach and reminds me of a comment made by Paul Harris, in March's Marketing Mix Round Table Video. "In my experience, nothing works better than a joined up approach, where you use multiple tactics..." It conforms to some of the most traditional of marketing principles and applies them…