Justin Timberlake always dreamed of the perfect denim, but he says he needed Johan and Marcella Lindeberg to make the dream come true. "Together, we're an emerging rock band", he said in the showroom the day after the third William Rast collection was launched in New York. It was all about denim -and denim's best friend, black leather, fringed and studded in classic biker style. There was a fashion element in a leather jacket that was extended, almost safari-style, and acid wash looked new-ish again, at least to Rast's young fit model, who'd not seen it before. The Lindebergs' sensibility is fundamentally all about goth leanness, which they managed to combine with JT's Tennessee boy-ness in the layering : an elongated tank under a long flannel shirt with a tailored jacket on top. But they should honestly take the collection in the direction that JT, newly anointed one of America's most stylish men by GQ, seems most drawn to. Elvis meets Sinatra, biker culture mixed with Rat Pack. An evening jacket in a sheeny lacquered herringbone hinted at the kind of alluring oddities such a union would produce.