When the Kardashians throw a birthday party they go big, but they’re about to outdo themselves with Kris Jenner‘s 60th … it’s gonna set the klan back $2 MILLION, TMZ has learned.

All six kids chipped in for her party Friday night … even Rob, whose name appears on the invite. They rented a giant soundstage in West Hollywood, which will be filled with 300 people.

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