POSH SPICE VICTORIA BECKHAM is keen to boost her image as a sex siren after arriving in America - because she's tired of being David Beckham's quirky wife. While the soccer hunk, who is about to embark on a new career as a player with the Los Angeles Galaxy, is considered an international sex symbol, his wife admits she often feels lost in his shadow. She explains, "It's funny, whenever anyone goes out with us they say, 'David's so gorgeous and she's so funny.' I'm sick of being funny... I want to be fit (sexy)."