Feb 4, 2014 | This won't be good for their new albums!!!! @KhloeKardashian @KylieJenner by KimKardashian on Keek.com



They shouldn't quit their day jobs!

Kim Kardashian loves to pull a good prank every once and a while, and yesterday she tried to sneak a video recording of her sisters Kylie and Khloe singing along to Justin Timberlake's "Mirrors" in the car!

The reality star slyly held up her phone to try and capture her 16-year-old sis belting it out in the back seat, but her 29-year-old sister caught her and shouted, "Sing it Kyles!"

"This won't be good for their new albums!!!! @KhloeKardashian @KylieJenner," the Keeping Up with the Kardashians star captioned the Keek video.

Kimmy K singing would probably sound like a dying dog, so thank goodness she didn't participate!