It's good to include hobbies and interests, but try not to include anything just for the sake of adding it in. Art and fashion are both mentionable interests, especially if you can find a connection to your desired degree, such as your interest influencing your marketing work, etc. If you feel it tells the uni a bit more about you, then go ahead and add them in! But try to be concise, and even a bit more specific about what you like about each, e.g. period of art? Fashion marketing? Styling? Do you create any artworks?
Hopefully this helps! And best of luck with your application. 🙂 Emily Student Rep at BCU