They boast a combined 10.2 Twitter followers, but sisters Kylie Jenner and Kendall Jenner are still surprised by the throngs of fans who turn up to their events to show support.
"We still don't even think that we can have that many fans," Kylie told Access Hollywood at the packed launch of their PacSun Back to School collection in New York City on Tuesday. "We're still like, going out to the grocery store and there's like, paparazzi following us and we don't even realize yet."
Adding, "It's just crazy!"
The teen sisters (Kendall is 17, Kylie is 15) say the fashion line is completely true to their personal style.
"We design the whole thing from start to finish, so the whole thing is our inspirations and stuff we really want in the line," Kendall told Access .
Added Kylie, "We both pretty much sit for hours and put all our ideas together and make this line, so it's all us."
When they're not busy designing, shooting "Keeping Up with The Kardashians," or finishing homework, are the girls spending time with their new niece, North (sister Kim Kardashian's daughter), or getting to babysit?
"No, not now at least," Kylie said, while Kendall added, "Kim's pretty attached to the baby."
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