Models Kendall Jenner and Cara Delevingne got nostalgic with their Halloween costumes this year, channeling Mario and Luigi from the Super Mario Bros. video game. The pair took to Instagram to share cute snaps of their getups, which they sported for Adam Lambert's annual Halloween party in LA on Friday. For his part, Adam went with an elaborate werewolf costume, looking barely recognizable when he hit the red carpet. Kelly Osbourne also made an appearance, channeling Gwyneth Paltrow's character from The Royal Tenenbaums, Margot. Take a look at all the stars that stepped out for Adam's bash, and then check out Kendall's Hollywood evolution ahead of her upcoming 19th birthday!
Source: Instagram user kendalljenner