FASHION RIFF: While Mick Jagger is clad in threads by his designing woman L’Wren Scott as the Rolling Stones kick off their “50 & Counting: The Rolling Stones Live” tour this week, Keith Richards took to the stage of London’s O2 arena this week wearing some Saint Laurent by Hedi Slimane. According to Saint Laurent, the guitarist sported its woolen vest and a pleated silk scarf.

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