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A video posted by King Kylie (@kyliejenner) on

Kendall Jenner and Kylie Jenner are a couple of silly young women.

The dynamic duo was participating in a photo shoot Friday for their spring clothing line, but instead of working they decided to horse around! Kylie shared two videos on her Instagram page of their fun day on set, and in one video she and Kendall twerked and whipped their hair instead of taking pictures of the collection. In the second video they stand on a dolly and do backwards leg kicks.

The E! reality TV stars must have been a little bit delirious because the only caption Kylie could come up with was "Lol," so they must have had a great time together. With Kendall's modeling career and Kylie's busy schedule, the sisters have said it can be hard to meet up sometimes, so they're probably happy they got to goof around together! 

A video posted by King Kylie (@kyliejenner) on

Kylie has been especially busy with her businesses as of late, as she's already set to expand her Lip Kit next month. The Keeping Up With the Kardashians star unveiled a new color on her app, and it's not brown!

"I'm going to show you guys my new color for Valentine's Day," she said on her livestream. "It is so pretty." She also posted a graphic on her Instagram to debut the raspberry-colored hue and captioned the pic, "Very excited to share with you one out of three of my new colors for my valentine collection coming up. I've been working on a new very exclusive formula that I have absolutely fell in love with."

A photo posted by King Kylie (@kyliejenner) on

She continued, "But now I need your help on picking a name for this beauty! Go over to @lipkitbykylie for more info!"

Many fans turned to the comment section to give her their ideas, but in the end she chose the name "Posie K" for her line's new addition. Fans also don't have to worry about her Lip Kit selling out instantaneously this time around because she revealed in her livestream that the company would have more available.

"I'm sorry, you guys are just so amazing and you keep buying them," she said. "But I'm making a whole lot more so that I can always be stocked up!"

Make sure to watch an all-new episode of Keeping Up With the Kardashians Sunday at 9 p.m. only on E!