Kristen Stewart has been causing quite a stir this week as she is spotted leaving the set of her latest movie The Runaways with a black mullet, which most of you didn't like. She has been keeping in with the rock image off-set too in plaid shirts, skinny jeans, Converse All Stars and another key accessory. When leaving the set earlier in the week with Joan Jett I noticed her lightning necklace which is sure to become a key item for her fans. It's easy to copy Kristen's style as there are many different lightning necklaces available including Pirate treasures' kitsch brass version (£6.99, pictured below). Spoiled Brat offer a diamante version (£40), Punky Pins have a cool neon take on the style (£2), but Me Me Me have created my favourite out of enamel with skull and star pendants too (£45).