Britney Spears ' sons, Sean Preston and Jayden Federline , are struttin' their stuff on the runway for Paris Fashion Week for the first time ... and showcasing two very different styles. The pair walked during the Vetements Menswear Spring/Summer 2027 show Friday ... and, while they're close in age, they certainly didn't dress like twins. Check it out ... Sean Preston's looking tall, dark and handsome in a shiny black suit jacket ... accompanied by a black button-down, black tie, and a pair of