If there’s one thing you can always count on ... it’s celebs going all in for Halloween -- serving up scares, laughs, and spooky slayage! We’ve got Paris Hilton channeling her inner Britney , Meghan Trainor and Kris Jenner teaming up for some killer costume snaps, and one total hunk giving us chills by suiting up as Ghostface. Here’s Ed Sheeran looking totally unrecognizable and clowning around -- yeah, you could say he’s bringing the "It" factor!🤡 Janelle Monáe nailed her 'Nightmare Before