Kim's dress is called a Red QiPao-CheungSam and is typically a Chinese wedding dress.

Nicki's wearing a Japanese Kimono.

It's one thing if it's really alike, THEN you can claim copying but at least know the history of what you claim is a copycat instead of being spoon-fed something and accepting it as fact. Kim did a lot of cool stuff with her outfits but she didnt invent. She took it from another source herself and other folks have worn it. I even found a pic of Paris Hilton in a dress like Kim's.