Kim Kardashian, sister Khloe and mother Kris are among the Kardashian family members who appear in a cover music video to Katy Perry's 'ET'. Sisters Kylie and Kendall spearheaded the lip-synched project, which was shot during a recent family vacation, reports OK Magazine.

Khloe Kardashian was first to post the video on her personal blog yesterday (31st May 2011), telling fans, "Hi dolls! Happy Tuesday!!!!! I hope you all had a fab Memorial Day weekend. I'm so excited to finally present you to Kardashian/Jenner/Odom/Disick Humphries family music video" Khloe described sisters Kendall and Kyle as being "so creative", revealing that the entire family were forced to learn the words to Katy Perry's hit song. 30-year-old Kim also took to her blog to discuss the project, saying, "The whole family went on vacation recently and Kendall and Kylie thought it would be fun to make a family music video to Katy Perry's 'Et.' Even Mason took part, LOL. I loveeee this video!! Kendall and Kylie both directed and edited it! I can't believe how great it turned out. They truly are geniuses!" The video features Kim's future husband Kris Humphries, who reportedly popped the question to the reality star last week.

The new series of 'Keeping Up With the Kardashians' is set to premiere on 12th June 2011. Season five of the show finished with Khloe celebrating her birthday in New York City with family and friends while Kim was spotted partying with the football player MILES AUSTIN, causing her ex REGGIE BUSH to become jealous.