Kylie Jenner might be just 13 years old, but that didn't stop big sister Kim Kardashian from bringing her to a posh club opening in Sin City Friday night.

"Vegas baby! Heading to Sugar Factory! I brought my little sis @KylieJenn here to Vegas w me," the reality queen, 30, tweeted. "She’s never been before!"

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An excited Kylie tweeted back, "Vegas baby!" and posted a pic of her and Kim in a private plane en route to the event.

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At the party, the sisters chatted with former Spice Girl Mel B. and sucked on complimentary lollipops.

No doubt, the DJ probably played Kim's debut single, "Jam."

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Kylie tweeted about the tune, "I can't get JAM, my sister Kimmies new song out of my head!"

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