Kendall Jenner, Kylie Jenner,  I'm Yours Music

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It's a karaoke party!

Kendall and Kylie Jenner as well as a slew of their closest friends—including Anastasia Karanikolaou, Jordyn Woods and Shamari Marucice—made a cameo in their bestie Justine Skye's new music video for "I'm Yours."

The party-themed vid shows the girls lip syncing the words to the song as they dance around a leopard-print karaoke booth and eventually meet up with their squad at a club.

Though both Kendall and Kylie are very successful at many things, the new music video proves they could use some assistance in the karaoke/lip-syncing department.  Kendall can't seem to get the words quite right as she laughs awkwardly while attempting to mouth the lyrics. Meanwhile Kylie—who, thanks to Snapchat, is usually the queen of lip-syncing—also looks a bit uncomfortable with a microphone (rather than a cell phone) in her hand.

Either way, the video as a whole looked like it was one big party among all the girls' closest friends, so looking perfect while lip-syncing probably wasn't even on their minds.

Skye premiered the music video in Times Square on Tuesday, teasing it throughout the week on Instagram with several photos of Kendall and Kylie.

Meanwhile, this is just one of the several cameos both Kendall and Kylie have made in music videos. Last year, they were both featured in the vid for "PartyNextDoor" by Recognize ft. Drake.

Most recently, Kylie has made appearances in several of Tyga's music videos, including one for "Stimulated"—in which they share some passionate makeout moments—as well as transforming into a zombie for "Dope'd Up."

We're sure we'll be seeing them in several music videos in the future, too!

For more on Kendall and Kylie, make sure to stay tuned for the Keeping Up with the Kardashians premiere on Nov. 15 at 9 p.m. only on E!

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