Demi Lovato's Halloween Costume Party can be described in one word - epic. The guests? So game!! 

On Oct. 26, 2019, the 27-year-old "Give Your Heart a Break" singer staged a party at the HYDE nightclub in Los Angeles ahead of the actual Oct. 31 Halloween Holiday. It was attended by numerous TV personalities, models, and some who stunned the crowd with their costumes.

1. Demi Lovato as Pennywise

Following her first Marie Antoinette costume she shared on her Instagram account, the host turned into the female version of Pennywise, the lead character on Stephen King's "IT." Her costume was based on the recent adaptation of the movie.

As usual, the singer displayed her killer clown image on her Instagram story alongside the caption "My mom is the best [laughing emoji]."

Demi also revealed the behind the scenes before she achieved the Pennywise look that unleased the "lady killer clown" within her. Despite channeling the clown, though, she also looked a bit like Harley Quinn with her red wig and smokey red eye make-up.

Meanwhile, Dianna De La Garza, her mother, went as Georgie -- the little boy who the clown killed in the first part of the film.

2. Kylie Jenner and BFF Stassie as Madonna and Britney Spears

They were not dressed as spooky as Lovato, but fans were sure that they screamed the loudest when Jenner and Karanikolaou recreated Madonna and Britney Spears' looks during the 2003 MTV Music Awards and their pop-culture legend -- the kiss.

The Kylie Cosmetics founder accomplished the full-look costume of Madonna with a microphone, hat and blonde hair. Meanwhile, Karanikolaou donned Britney Spears' outfit during 2003 VMAs. The self-made billionaire and her BFF posted a tribute for the pop stars by dancing to "Like a Virgin" on their Instagram account, as well as doing the infamous quick peck before they burst out laughing.

What made the fans more frightened, however, was the news about Jenner being involved in a car accident in West Hollywood while on her way to the party. According to In Touch, Jenner was in the backseat during the fender-bender. Luckily, she did not obtain any serious injury and the party went on!

3. Ashley Graham as Jessica Rabbit

The now-pregnant American Model Ashley Graham has successfully unleashed the Jessica Rabbit within her. She displayed the fictional sex symbol in a full length, strapless-designed top and even accessorized herself with tons of jewelry.

Her look was created by the famous American artist, Ash K Holm, and celebrity hairstylist, Justin Marjan.

She also gifted her fans with a sexy video while saying, "I'm not bad, I'm just drawn that way."

4. Madison Beer in her "daring" look

Singer Madison Beer turned when she entered the Hollywood party with Hana Cross while wearing a pink lingerie-inspired dress. She complemented the look with her pastel make-up, though she did show off her underwear underneath.

The 20-year-old singer will soon have her first album entitled "Life Support."

5. Larsa Pippen Debuts Wearing Her First Halloween Costume

Who says Halloween should always be fear-provoking? The 45-year-old Larsa Pippen flaunted her camouflage bralette and shorts which was a G.I Jane-inspired look. She complemented the costume with a pair of lace-up black boots.

Her first sexy Halloween costume received a lot of compliments on Instagram and ended up as a hit just like when she also attended Drake's 33rd birthday party a few days ago.

 
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A post shared by  Larsa Pippen (@larsapippen) on Oct 26, 2019 at 10:24pm PDT