The teen stars were thrown a surprise bash in their mother's backyard to celebrate Kylie, who graduated from high school this year, and Kendall, who graduated in 2014.
Much of the party was documented via Kylie's own Snapchat videos and, in one of the clips, Kardashian is seen dancing next to a man who appears to take something out of a small container, and is then seen putting his finger in his mouth -- sparking rampant speculation that there was drug use at the party.
In response to the rumors, Kardashian took to Twitter on Saturday, where she denied anyone was using drugs at the party, explaining what they saw likely a guest loosening the rim on a jello shot:
She also responded to a fan who tweeted at her, "Damn, when will the rumors stop. Who would do that a graduation party?" replying, "ummmm not us! That's just insane."
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