I alway loved contrasts and this is a perfect mix.
Put a unisex t-shirt on, (you could also steal it from your boyfriend wardrobe: )) and mix it with a super feminine necklace or high heels. Easy!!!
By the way this is "Les plus dorè". It' s a small clothing brand based in New York City.
As they say of themself: "We make limited edition goods for the most golden".