The best part about Halloween falling on a Tuesday this year, is that it has easily turned this one day holiday into a several day event. This year, celebrities like Kim Kardashian West, Demi Lovato, Rita Ora, and plenty more decided to break out their costumes early for several festivities over the past weekend. And we're not sure what it is, but stars have seriously taken their costume game to a whole other level this year, fiercely channeling musical icons, villians, and a few terrorizing characters. 

Here are some of the hottest looks that have spooking up our newsfeeds. 

The Queen of Halloween Heidi Klum outdid herself yet again this year by transforming into the werewolf from Michael Jackson's iconic "Thriller" video. 

Dorinda Medley enlisted Priv's services to help her transform into a fab Lady Gaga this year. A Priv Pro helped create Dorinda’s look from the comfort of her own home, and you can easily get this treatment as well by downloading the Priv app.

Jay-Z and Beyoncé crushed their famous couple look as Notorious B.I.G and Lil' Kim. 

Gigi Hadid and Zayn Malik were too cute as Spiderman-Man and Felicia Hardy. 

Khloé Kardashian and beau Tristan Thompson slayed as Game of Thrones' Mother of Dragons Daenerys Targaryen and Khal Drago. 

Ariana Grande and Mac Miller shut down the game as Katinka and Mugatu from Zoolander. 

Jhené Aiko brought our her inner superhero as Starfire from Teen Titans. 

Kim Kardashian West and Jonathan Cheban gave off serious '70s vibes as Sonny and Cher. 

Demi Lovato nailed her tribute to Latina icon Selena Quintanilla. 

Serious Question: Can Rita Ora be cast as Poison Ivy IRL?! 

We're still not quite sure what look Adele was going for here. But whatever it is, she looked fab doing it. 

West ditched Sonny and came out to play dressed as '90s Madonna, accompanied by big sis Kourtney as Michael Jackson. 

Kandi Burruss was one fab Pennywise. 

Behati Prinsloo is the cutest creepy pregnant skeleton you'll ever see. 

Jessica Alba as Juno gave us life. 

Kim Zolciak-Biermann and Kroy Biermann made the perfect Hugh Hefner and Playboy Bunny Tiffany Fallon. 

Karlie Kloss or Marilyn Monroe? We'll let you take a guess. 

So does this mean Lais Ribeiro will officially be bringing Mystique back in the next X-Men movie? Talk about fierce!

Luanne de Lesseps worked her Countess Dracula costume. 

Meghan King Edmonds' unicorn look was SO sparkly. 

Brittany Cartwright added her own spin on Little Red Riding Hood. 

Sarah Michelle Gellar merged her love of unicorns and Mermaids to create the "Mermicorn."