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Internet star Avani Gregg looks like she hopped straight out of "Avatar" right onto your screens! Grab your makeup brush, and your magnifying mirror ... and see if you can smooth out the minor blemishes. (You might want to watch out for the sharp accessories)!

Known for her spooky and special effects makeup, Avani fully decked out in blue and busted out of her everyday shell for this "Avatar" look. Keep your eye on the prize and see if you've got what it takes to track down the switch-ups.

These bulky boys are battling it out!!! Lil Nas X and Chris Olsen both took their shredded bods to Instagram -- letting it all (almost) hang out -- but which sexy shot is doin' it for ya the most?

The question here is: Who'd You Rather?!

VOTE NOW!

Before this Texas native and cutie pie in pink turned into an American actress and singer, she was moving to Edgewood, Florida with her rents and lil' bro, and dressing up as her favorite princess for Halloween.

Contrary to her days as a princess, one of her most recognizable roles was playing a vampire, where she drank the blood of Ian Somerhalder's character. She also played the fantasy roles in "The Originals" and "Legacies."

Musically, this shining star released her debut album, "It's Always The Innocent Ones" back in 2006 and was a backup singer for Miley Cyrus in 2007-2008.

Halloween is THE day to dress up as whatever you flippin' want, so these celebs gave ode to their fave stars by fully dressing up as ... them! Take a scroll through the twinning pics ... This takes imitation to a whole new level of flattery!

Dwayne Johnson transformed his "rock" hard bod into David Beckham circa 2003, Drew Barrymore painted a nearly identical image posing as painter Bob Ross (hairy chest and all), and Kerry Washington scored gold in her Sha'Carri Richardson costume.

Yes you gotta master the wardrobe, but Rihanna showed her followers it's all about the pose too -- replicating rapper Gunna's day-to-day vibe.

Ice Spice is always a hot and popular choice among the stars ... Lil Nas X, Trisha Paytas and Eric Andre nailed the music star's iconic look!

American actress and model Jennifer Rubin was in her mid-20s when she became best known for playing the troubled asylum teen, Taryn, in the 1987 slasher sequel "A Nightmare on Elm Street 3: Dream Warriors."

Joining Jen on the big screen included Robert Englund as the undead serial killer, Freddy Krueger, Heather Langenkamp as the new intern at the Westin Hills Asylum, Nancy Thompson, and Patricia Arquette who was finally able to defend herself against Freddy as a Dream Warrior, Kristen Parker.

Other notable work includes her roles in "Bad Dreams," "The Doors" and "The Crush."

Before this lil' star with his sword was an international star, he was just throwin' on his tricorn, fighting his way to be a musician and growing up in England ... Arr you prepared to guess this matey?

Aside from his superior singing skills, he's written songs for some of music's hottest stars like The Weeknd, Taylor Swift and Justin Bieber -- whom he's also collab'd with vocally, but perhaps you don't care.

One of his top songs is a popular and perfect wedding song.

These hot Hollywood couples have stepped out of their everyday garments and are rockin' some adorable and almost too hot to handle Halloween Costumes! They came to slay, but can you nail down the unknown duos in this fun game of "Guess Who?!"

Take a swipe through our gallery and peek-a-boo at which cute couples absolutely crushed their spooky lewks. Can you can guess which celeb duo is on top of their costume game?

Come with some celeb knowledge and guess to impress as you embark on some crazy-cuteness. Keep both eyes peeled and you will be treated (or tricked) by some classics like Woody and Bo Peep, Albus and Remus, and an A-list singer dressed as a pickle with her man ... they're kind of a big dill!

American actress Gillian Jacobs was in her mid-20s when she first started playing Britta -- the smart and progressive hipster with a group of friends at Greendale Community College -- in the sitcom "Community" back in 2009.

Britta was part of an ensemble cast including Joel McHale as the former defense attorney going back to school and leader of the friend, Jeff, Donald Glover as the sensitive and goofy friend who cares deeply for his peers, Troy, and Alison Brie as the optimist gal -- super dedicated to her school, Annie.

Khloe Kardashian turned her Calabasas home into a Halloween pumpkin palace for the annual cousins' pumpkin party -- totally decking out her digs! Khloe brought the spooky vibes and flooded her home with big ole' balloons, goodies n' treats and pumpkins out the wazoo!!!

Of course, Kris Jenner (aka "Lovey") was in attendance -- seen showing off her sexy Snow White costume ... and Khloe's besties, Natalie Halcro and Olivia Pierson, joined in on the festivities and rocked some cat ears.

Khloe snapped a sweet selfie with her kiddos, True and Tatum, all sporting cozy skeleton onesies.

The KarJenners are taking over the film world ... not only is Kim flexing her acting chops these days -- they're also lighting up the red carpet at the Academy Museum Gala!

Kim, Kylie Jenner and Kendall Jenner hit the red carpet at the glitzy affair -- nicknamed the "Met Gala of the West" -- in their updated take on Hollywood glam ... stylish dresses showing just a little more skin than Ava Gardner might've.

Check out the ensembles ... Kim's putting on a leggy display in an all-white dress with no coverage of her legs -- while Kylie went with a flesh-colored top and Kendall wore a black cocktail dress.