Kylie Jenner's chauffeur was a buzzkill Saturday night as the makeup maven and her BFF rolled up to Demi Lovato's Halloween bash at Hyde nightclub and got in a fender bender in the parking lot! In front of the paparazzi, Ky's driver reversed into another car and when he pulled forward, paps, party-goers and fans could hear the horrible scrape of the bumpers rubbing against each other. Instead of sucking it up and heading inside, Kylie told her driver to continue on through the parking lot and head home! Too bad her awesome Madonna costume didn't get more play!

Meanwhile, her BFF Stassie Karanikolaou -- dressed as Britney Spears to Kylie's Madonna, circa MTV VMA Awards 2003 -- watched in shock as Kylie's Range Rover reversed into the car behind it ...



Check out Kylie and Stassie's AWESOME partner costume that went basically unseen, except for the bazillion views this video got on social media!