My next BusinessWeek.com column takes on the topic of authenticity in branding. In it I describe how the Citi brand is suffering from (among other things) an authenticity crisis.

Companies that didn’t make the cut in the column include Nike, Southwest Airlines and Chipotle, among others, and I will be commenting on their brand authenticity (or lack thereof) in upcoming posts, some of which may surprise you.

I’d like to invite your suggestions on other brands that may be particularly authentic—or authenticity-challenged. Feel free to comment below or drop me an email at Steve.McKee@WhenGrowthStalls.com with your thoughts on which, and why. If I use your idea I’ll be happy to give you a plug. And look for my column this week.