This is a tomboy yet still girly look. Its very casual and can be worn for any occasion. The denim button up is from Target and the graphic T-shirt is from H&M. The shoes are white converse that match with anything and can be dressed up or dressed down.  

To add more to this casual look accessorizing is a most! Layering is always a good idea for simple shirts. These necklaces can be found in Forever21.