Cat ears are the simplest and easiest to find option, but any kind of animal ears plus a top or dress in the appropriate color palette works.
If you can find some butterfly or fairy wings, all you need is some fun and colorful makeup to complete the look.
You can be any kind of Barbie you want to be. Just rock the pink version of the outfit needed for Cowboy Barbie, President Barbie (any pink suit or suit with a pink blouse), or similar.
Wear a breton striped top, a beret, jauntily tied scarf, and maybe a baguette in a tote and you’re a Parisienne.
If you love Taylor Swift this is super simple. Wear sparkles, glitter, red lipstick (she reportedly wears Pat McGrath LiquiLUST in the shade Elson 4) and any merch you already own.
Already have a little black dress? Add a three-strand pearl necklace and a small rhinestone tiara and you’re set.
Wear an oversized crew neck sweatshirt (like the Northwestern one she had), knee length bike shorts, and white sneakers with white scrunched socks.
Just put on a tiara, crown, feather boa, massive amounts of jewelry, sparkly eyeliner, bold lips or whatever says “diva” to you and rock it. You are the queen.