Kylie and Kendall Jenner took a trip to Australia this week to promote their Kendall + Kylie collection. Kylie Jenner posted a Snapchat of a screaming crowd that mobbed the sisters as they arrived in Sydney.

The young stars are increasingly famous. The duo are are reportedly plotting to branch away from their older Kardashian sisters and the family brand, with some expecting the sisters to become even bigger stars.

Rumors also indicate that Kylie Jenner is working on rap songs in the studio. After Kim Kardashian attempted and failed to launch a music career, Kylie Jenner could be the first member of the Kardashian-Jenner clan to find success in the studio.

Meanwhile, Kendall and Kylie Jenner's new Topshop holiday collection comes with sleek, sophisticated neutral clothing that can go equally well at holiday festivities or New Year's Eve parties.

"We really wanted to showcase our personal style but mix it up with a holiday twist," the sisters said in a press release. "The holidays are always so festive and of course, you have to have the right wardrobe for every occasion. We wanted to design a special line of pieces that capture both an elegant and edgy vibe."

The 15-item collection does not offer the usual holiday getup with bright colors and Christmas sweaters.

"They're super versatile and work for not only the holidays but basically every season," the Jenners said. "Everyone looks good in a chic black top and pants combo. The varsity jacket is a good gift for all of our friends!"

The sisters offer a variety of pieces in their holiday collection, including origami crop tops, metallic skirts, lace-up body suits, cream maxis and fur jackets.

Items will be available at Topshop and select Nordstrom stores on Friday Nov. 20.

Meanwhile, Kylie Jenner sucked Kendall Jenner's tongue in a Snapchat video, giving fans a laugh.

"She sucked my tongue... I'm dead," Kendall captioned the snap.

Check out another video posted to Instagram below.