Welsh singer DAME Shirley Bassey is starring in a Christmas TV ad for British chain store Marks + Spencer. The DIAMONDS ARE FOREVER star has already shot the spy movie-themed ad, in which the chain's existing models TWIGGY, ERIN O'CONNOR, LAURA BAILEY, NOEMIE LENOIR and Elizabeth Jagger play undercover agents given a secret mission to watch Bassey singing at a glamorous Christmas party. Bassey has also provided the soundtrack for the ad, recording a version of Pink's GET THE PARTY STARTED especially for the campaign. STEVEN SHARP, marketing director for Marks + Spencer, boasts, "We wanted a really glam, gorgeous feel to the TV ad this year and who better to team up with our very stylish famous five than the ultimate British music and style icon, Shirley Bassey. "It's a real all-singing, all-dancing ad with every element of Christmas you could possible imagine from party dresses to reindeer to champagne."