Kristen Stewart explodes in a jealous rage at Jennifer Aniston and Jennifer Lawrence

"Kristen Stewart has exploded in a jealous rage at rival actresses Jennifer Aniston and Jennifer Lawrence, as well as singer Katy Perry," sources tell the National Enquirer.

Stewart is "losing her grip on reality."

Stewart is "said to be having a confidence crisis," explains the magazine.

"Kristen's feeling very sorry for herself," a source tells the Enquirer.

"Seeing Jennifer Lawrence being worshipped on the red carpet, winning a Golden Globe and getting nominated for Oscars has really gotten to her," alleges the tabloid. "She's come out of nowhere and is getting the adulation that Kristen used to dream about."

"Kristen's always been a big fan of Aniston's deadly rival Angelina Jolie and has never really rated Jen as an actress," a different "source" tells the Enquirer. "She can't understand why Jen manages to hog the headlines every time with very little effort."

The Enquirer also claims that Stewart was upset about Perry finishing first in a Men's Health ranking of the "Hottest Women of 2013."

"Kristen couldn't believe that Katy Perry was No. 1 on that list," an "insider" tells the magazine. "She's known Katy for years and doesn't think she looks that hot, especially without her makeup."