Kendall Jenner and Hailey Bieber paid homage to the most iconic best friend duo of the 2000s, Paris Hilton and Nicole Richie.

Celebrity couple Selena Gomez and Benny Blanco channelled their inner Alice in Wonderland and Mad Hatter, while internet star Alix Earle was dressed head to toe in an elaborate Cheshire Cat look.

Chicken Shop Date’s Amelia Dimoldenberg requested her crushes look away from her Instagram page, before posting a carousel of photos of herself dressed as Roz, the grouchy slug, from Monsters Inc.

While Janelle Monae potentially won Halloween with her incredibly life-like prosthetic ET suit.

For a deeper dive into all the star’s outlandish Halloween looks, scroll on.

 

View this post on Instagram

 

A post shared by Lizzo (@lizzobeeating)

 

View this post on Instagram

 

A post shared by Christina Aguilera (@xtina)

 

View this post on Instagram

 

A post shared by Selena Gomez (@selenagomez)

 

View this post on Instagram

 

A post shared by Paris Hilton (@parishilton)

 

View this post on Instagram

 

A post shared by Amelia Dimoldenberg (@ameliadimz)

 

View this post on Instagram

 

A post shared by Janelle Monáe (@janellemonae)

 

View this post on Instagram

 

A post shared by ELLE Australia (@elleaus)

 

View this post on Instagram

 

A post shared by Cosmopolitan (@cosmopolitan)

 

View this post on Instagram

 

A post shared by The Chainsmokers (@thechainsmokers)

 

View this post on Instagram

 

A post shared by Ed Sheeran (@teddysphotos)

 

View this post on Instagram

 

A post shared by Trisha Paytas Hacmon (@trishapaytasbackup)

 

View this post on Instagram

 

A post shared by Chlöe (@chloebailey)

 

View this post on Instagram

 

A post shared by S O P H I E T U R N E R (@sophiet)