Now that October is officially under way, we're in crunch time to find the perfect Halloween getup. Sometimes though, costume-hunting takes a backseat to—well—life.Where do you go when Party City's sold out of everything on October 30th and you don't have a costume? Fear not—we've found the best of the best last-minute looks you can DIY in an instant.Whether you want to focus on makeup, hair, or your outfit, all of these costumes will be a super easy to look relevant and awesome on October 31st.MakeupAladdin SaneAmong David Bowie's most notable looks was the Aladdin Sane (1973) album cover. It's so classic that it's even made its way to the big screen—Dakota Fanning broke out a more feminine version in The Runaways.Floating HeadIt's not every day you find a look that's quick, simple, and ripe with the Halloween creep factor. Just remember to keep the lights off.Tina BelcherIf being perpetually awkward is your style, then this cartoon look is right for you. Just remember to drop your voice about ten octaves and have no game whatsoever.Harley QuinnSuicide Squad may have tanked, but that hasn't stopped everyone from obsessing over Margot Robbie's manic Harley Quinn. Robbie is the newest "It Girl," and everyone's going to want to master this look.HairRey from Star WarsThe force is officially back, and with Rey at the helm! The newest badass in the galaxy is ultimate Halloween goals.DaenerysSure, Dany Targaryen is stunning, but unlike most of the costumes we see around, hers has a personality, not just an idealized body. This approachable hair tutorial is sure to help you channel your inner Khaleesi.Lost in TranslationIt's a bit of a throwback, but Lost in Translation has one of Scarlett Johansson's most memorable roles—seriously, who doesn't want pink hair? Thankfully, this look is super easy. All you need is to find a bubblegum pink wig, and Amazon is chock full of 'em!OutfitLemonade BeyoncéWe've had tons of Bey-related obsessions since the legendary Lemonade dropped, back in April. The phenomenon of her video album will reign supreme for the foreseeable future, and her badass look from the "Hold Up" video is one of the best moments of the whole thing. All you need is a canary yellow maxi dress. Seriously, you don't even need shoes. You might want to bring along a baseball bat though, and your S.O.'s car. Have at it!ElevenIf you're a Netflix junkie (who isn't?), you probably binged and fell in love with Stranger Things this summer. Even if your obsession with Eggo waffles hasn't been renewed, there's no doubt you have a sudden interest in all things '80s and telepathy. And, oh yeah, the awesome Eleven. You just need a pink dress with a Peter Pan collar, a blue jacket (a blazer or cardigan can sub), and white knee socks to rock her retro look. Don't forget red paint for the nosebleed!Ilana from Broad CityNow you can be the ultimate kween with just a jersey, booty shorts, a SnapBack and black lipstick. Yas yas yas yas.