What the heck is going on with Kristen Stewart's hand? Kristen, 20, was spotted wearing a mysterious blue cast around her left hand as she arrived at LAX.

The Twilight beauty kept a low profile in a yellow hoodie and an American Apparel deep v-neck t-shirt despite being an injured movie star.

Kristen is currently filming Breaking Dawn Part 1 and 2 in Baton Rouge, Louisiana so the injury could be related to the filming. Be careful with those stunts, KStew!