Stephanie Pratt either wants to share her eating disorder story to help anyone else struggling with this awful disease…or she’s taking a page out of her brother Spencer’s book and trying to cash in on her 15.

In this week’s issue of Us Weekly, Stephanie opens up about hating her body and her terrifying secret struggle with bulimia — sparked, she says, by the pressure of appearing alongside her super-thin friends on the hit MTV reality show.

The 5-foot-7 23-year-old says he began a 5000 calorie bingeing and purging cycle after watching herself on tv with Lauren Conrad.

“I was horrified. I remember saying, ‘I can’t believe how huge I look walking over to Lauren.’”

Says Pratt, “The producers never put pressure on us to lose weight,” but adds, “It’s embarrassing working with skinny girls.”

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