A heavy, plaid blazer, a tee, and some jeans will give you a studious vibe in the best way. Consider accessorizing with vinyl-style shoes (like mules!), a structured bag, and a gigantic scrunchie.
The Marks and Spencer Sequin Blouse is perfect for the festive season and easy to dress up or down - but you'll need to be quick, as it's already selling out in several sizes ...