As celebrities prepare for the 2015 Oscars, some of them may have made some big mistakes in regards to their choice of clothing.

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One of the worst dressed winners at the Oscars 2015 is Naomi Watts. She donned a tight gown that did well in flaunting her figure although the style of it was not attractive. The silver color and the random black stripes did not make her look presentable.

Another big fashion error of the evening was Blanca Blanco who tried out a loose red gown that looked like it didn't even really fit. The color was less angelic and more like something eerie as it blended with some black swirls that weren't the least bit pretty. There are also some loose wrinkles on the dress making the actress' selection much more awkward.

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Some guys of the night didn't do too well either. Musician Will.I.Am dressed up like he was going to a basketball game instead of an award ceremony. He wore a black jacket with dark pants as well as a strange striped shirt- and a hat.

Check out the slideshow and decide who had the biggest fashion fail of the evening.