Celebrities pulled out all the stops this past weekend to celebrate Halloween! Here are some of the best looks from this weekend! Kim Kardashian did 3 different looks and she nailed them all!First was her as Cher! Then as Aaliyah! Then as her final look she did a couple costume with her sister, Kourtney Kardashian, and they went as Michael Jackson and Madonna from the 1991 Academy Awards! The Kardashians were not the only celebs to dress up this past weekend!Demi Lovato paid tribute to Selena! Toys come to life as Justin Timberlake and Jessica Biel channel Andy, Buzzlightyear and Woody! Khalid and his bud as Tad and Chad! Down to the hair color and everything! Winona Ryder as...Winona Ryder and it is EPIC! Vanessa Hudgens put a glam spin on a clown! Will Poulter may have been evil Sid from Toy Story but his message was not evil at all! Halsey and G-Eazy look ultra glamorous as Daisy and Gatsby! Ansel kept it gangsta and went as a "Soundcloud Rapper" And of course Kristen Bell went as Elsa from Frozen!