You mixed up the policies. No Original Research is unrelated to why Bjork's Academy Awards dress has it's own Wikipedia article. No Original Research is why the article doesn't contain any new ideas or opinions by the article-writers themselves. The article accurately describes what The World has to say about the dress. The article has 13 sources cited 18 times providing external documentation for almost every sentence in the article.
The policy you wanted was "Wikipedia editors aren't allowed to decide how 'important' a topic is... Wikipedia Notability means that multiple independent Reliable Sources have published significant discussion of the subject." The World decides what is and isn't Notable, not me. As a Wikipedia editor I'm not allowed the opinion that it's embarrassment to humanity that Academy-Awards-Dresses are considered newsworthy. (I can have the opinion, but I can't delete the article based on my opinion.)
The sources include: telegraph.co.uk, shine.yahoo.com, Filmology: A Movie-a-Day Guide to the Movies You Need to Know ISBN 978-1-4405-0753-3, All about Oscar: The History and Politics of the Academy Awards ISBN 978-0-8264-1452-6, Vanity Fair magazine, Spin magazine, New York magazine, Reel Winners: Movie Award Trivia ISBN 978-1-55002-574-3, BjÃrk: wow and flutter ISBN 978-1-55022-556-3, The Advocate magazine, today.msnbc.msn.com. And there is no doubt that there are countless other uncited sources that exist. The World has clearly decided that this topic is worthy of significant published coverage.
By the way, this particular article has been getting around 55 pageviews a day. That's a lot higher than many of our more serious minor topics. Apparently there are a fair number of people coming to Wikipedia searching for this article.