Worries over K-Stew eating habits

Kristen Stewart is living on a diet of "Red Bull and cigarettes" in the wake of her split from Robert Pattinson.

The heartbroken actress - who was caught having an affair with 'Snow White and the Huntsman' director Rupert Sanders - is not looking after herself properly as she comes to terms with the end of her relationship with 'Twilight' co-star Robert, according to friends.