Inconsolable Kristen Stewart Smokes, Drinks Red Bull every day

The 'Twilight' star stopped looking after herself, and according to source close to the actress, is living on a diet of 'Red Bull and cigarettes' after her breakup from fellow 'Twilight' star Robert Pattinson.

Stewart's friends claim  the 22-year-old is facing the toughest time of her life, after breaking up from Robert Pattinson.

One of her friends recently admitted she has been a nervous wreck and existing on a diet of cigarettes, sugar-free Red Bull and  potato chips.

Kristen Stewart has been hiding from reporters at a friend's mansion in Los Angeles and is looking pale and worn-out. 

If friends try to persuade her to eat something, even a small bowl of soup, the actress either states that she''''s just had something, which isn't true, or that she's has a nausea and there's no chance of keeping anything down. 

"Kristen is grief-stricken and has reached the rock-bottom. In many ways, Kristen is trying to deal with her pain with cigs and Red Bull as a way of punishing herself,” the source noted.

The heartbroken star has not been seen on public since her split became sensation July, and even cancelled an appearance at the MTV Video Music Awards, which she was scheduled to co-host with Pattinson in September.