Jessica Alba and Cash Warren arrive ready to party at Kate Hudson's Halloween Bash
Halloween may be on Monday, but who is going to wait until then to play dress up! See how Jessica Alba, Kylie Jenner, Joanna Krupa and more are spending the last weekend in October!
Aubrey O'Day and Pauly D looked sexy as Cleopatra and a knight in shining armor.
Michelle Trachtenberg was a flower girl and clearly is great at doing makeup!
Maria Sharapova turned into Pippi Longstocking.
Kylie Jenner turned up as Christina Aguilera circa the early 2000s while Tyga dressed up as Juelz Santana.
And Christina approved of the look!
Suki Waterhouse looked like a sexy ballerina with her white tutu.
Keke Palmer showed off lots of skin.
Kelly Ripa and Jerry O'Connell dress up as Harley Quinn and The Joker for Halloween in New York City
Kelly Ripa and Jerry O'Connell dressed up as Harley Quinn and The Joker at the Live with Kelly Halloween show in New York City.
Ariel Winter was all legs as she went out to party.
Kate Hudson's Halloween Party
Kendall Jenner looked like a sexy dominatrix in all black as she headed to Kate Hudson's annual Halloween bash.
And check out those gams!
Her sister Kylie opted for a spookier outfit, as she and Tyga looked like scary skeletons.
Getting along! Kate's ex, Matt Bellamy, attended her shindig with his new girlfriend in tow as they channeled their inner Grease.
Jessica Alba was obviously ready to party as she brought the drinks.
Joanna Krupa kept it sweet and sexy while dressed as a scandalous butterfly.
Out in space! James Corden channelled his inner astronaut for the costume party.
Katy Perry and Orlando Bloom were unrecognizable as Hillary Clinton and Bill.
Kelsey Grammar came as his character on The Simpsons — Sideshow Bob.
Fashion trends! Rachel Zoe took it back to the 60s.
Adam Sandler kept it simple as he left the party.
Isla Fisher kept it hot in her mermaid outfit while hubby Sacha Boren Cohen made everyone say "Moo."
Johnny Knoxville signed off at the get together in his army gear.
Jenna Dewan-Tatum was a unique unicorn.
Derek Hough came prepared for a masquerade. Which look was your favorite? Let us know in the comments section.
Saving the best for last! Beyonce, Blue Ivy and .dressed up as Salt-n-Pepper. Push it!