Put on your thinking caps, ladies. Comme des Garçons' founder and head designer Rei Kawakubo is set to create this autumn's frenzy-sparking guest designer collection at H&M.

Kawakubo, famed for propelling the artistic and philosophical boundaries of fashion to some esoteric place we mere mortals dare not venture, will design H&M fashions for women, men and children, as well as accessories and a unisex fragrance.

The world launch of the collection will be at the opening of H&M's second store in Tokyo, Japan - Kawakubo's native country - in the beginning of November. Launch date for other H&M markets will be a few days later.

To call Kawakubo avant-garde would be an understatement, so it will be interesting to see how her experimental designs translate to fast-fashion. I have no doubt, however, that it will be spectacular. Even if it gives me a headache.

Above: A look from the SS08 Comme des Garçons runway, courtesy Style.com