North West wasn’t the only person having an epic tantrum at Kanye West‘s fashion show! RadarOnline.com has learned that mama Kim Kardashian threw a hissy fit backstage after the 20-month-old’s crying bout, blaming assistants for neglecting to retrieve the tot, and embarrassing her in front of Vogue editrix Anna Wintour. PHOTOS: Kim Kardashian’s 31 Most Embarrassing Wardrobe Malfunctions Ever During North’s crying fit, “Kim tried to get the attention of one her assistants, or another staff member because she didn’t want to get up from her seat in the front row,” an insider told Radar. “Unable to get anyone’s attention, Kim was forced to get up and taking the screaming child backstage. North was handed off but not before Kim vented about her frustration, and ended up throwing a hissy hit.” “Kim told staffers that they should always be on stand-by​, and issued a stern warning about not letting it happen again,” the source continued. Radar broke the story: Vogue fashion queen Wintour wants children banned from fashion shows after sitting next to North during the tantrum. PHOTOS: Kanye’s 60 Most Outrageous & Unbelievable Quotes “Anna doesn’t think fashion shows are appropriate for very young children such as North West,” an industry insider previously told Radar. “The loud music, the lights from the show, along with flashes from all of the cameras, and of course, all of the people is just overwhelming to a toddler. Anna never would have brought her now-adult children to fashion shows when they were young.” Meanwhile, “Everyone backstage at Kanye’s fashion show was really surprised by Kim’s outburst. She is typically very professional. North screaming definitely rattled Kim, and she seemed more concerned about returning to the front row, than taking care of her daughter,” the source added. From radar online..