The Canadian Tuxedo. The head-to-toe denim look can be difficult to pull off, but I am seeing it emerge everywhere in both retro and modern ways. Styled right this look can be super chic.
My favorite of course is this amazing look from the Burberry Spring '09 show.
(Photos: First 3, Ginza February 2009, Levis Spring '09, Burberry on Style.com)