Few who witnessed last year’s Oscar broadcast will ever forget the sight of Best Actress winner Gwyneth Paltrow accepting her statuette for “Shakespeare in Love.” Gowned in a strapless, full-length pink Armani, the actress sobbed profusely as she ticked off the names of people she wished to thank. Gwyneth, 26, now is saying that she broke down simply because she could not believe that she had won. But, looking back, she tells this week’s issue of Britain’s Now magazine: “I can’t believe I was such a wimp.”