Is it 2006 again? 

It may be more than a decade since Paris Hilton's infamous debut single, "Stars Are Blind," but it feels like we're in a bit of a time warp considering the heiress has dropped a new single titled, "Best Friend's Ass." The star sparked some buzz a week ago when she shared a clip of herself with Kim Kardashian, teasing they were working on a secret project together. That project has finally been released in the form of a glamorous music video.  

On Friday, the DJ released the glitzy music video on YouTube, with a much-anticipated appearance from her former assistant Kim K. Hilton recently explained on E!'s Daily Pop that she invited the KKW Beauty mogul to participate in the video, since "it would be a crime not to have the most infamous ass in it."

Kim must've agreed, because Paris Hilton says that within two days of presenting her idea, she and Kim were on set in matching silver dresses. She describes the experience as "just perfect."

In honor of their latest collaboration, relive their friendship with E!'s gallery below: 

Paris Hilton, Kim Kardashian

Jeff Kravitz/FilmMagic for HBO LA

Paris Hilton, Kim Kardashian

Chris Polk/FilmMagic for Bragman Nyman Cafarelli

Paris Hilton, Kim Kardashian

Barry King/WireImage

Paris Hilton, Kim Kardashian

SGranitz/WireImage

Paris Hilton, Kim Kardashian

J. Vespa/WireImage

Paris Hilton, Kim Kardashian

Jon Kopaloff/FilmMagic

Paris Hilton, Kim Kardashian

EyesWideOpen/WireImage

Paris Hilton, Kim Kardashian

John Stanton/WireImage

Paris Hilton, Kim Kardashian

PhotoNews International Inc./Getty Images

Paris Hilton, Kim Kardashian

PhotoNews International Inc./Getty Images

Paris Hilton, Kim Kardashian

Chris Wolf/FilmMagic

Kardashian Holiday Party, Paris Hilton, Kim Kardashian

Courtesy of @johnandjoseph

Kim Kardashian, Paris Hilton, Kardashian-Jenner Christmas 2018, Party

Instagram / Kim Kardashian

Kim Kardashian, Paris Hilton, Paris Hilton Birthday Party

Instagram / Kim Kardashian

Paris Hilton, Kim Kardashian, Baby Shower, Baby No. 4

Instagram / Nicole Williams

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