A 2006 print campaign for American Express is doing the rounds of ad blogs. This one, one of my favourite Amex campaigns, is a celebrity testimonial done with a difference. The print ad is a first person fact sheet of sorts, written by the celebrity.
The even better part of this campaign was the execution of the idea on TV. Check out the Ellen DeGeneres TV spot, which won the Emmy award for the most outstanding commercial in 2007.