Social Media Roundup: Chiquis Rivera, Demi Lovato, Lili Estefan Celebrate Halloween Early

Even though Halloween isn't until Oct. 31, plenty of stars celebrated the holiday early, sharing their best costumes and memories on social media.

The daughter of "La Diva de la Banda," Chiquis Rivera celebrated Halloween early by dressing up as a female version of popular DC Comics villain The Joker for a friend's birthday party.

Rivera shared photos of her costume while at the party on her Instagram account.

The singer can be seen dressed in the character's classic purple and green colors. Rivera also painted her face white and wore red paint to mimic the villain's clown-like look, adding a green wig to top off the look.

Actress Victoria Justice not only posted a few costume ideas for her fans, but also shared photos of her visit to Universal Studios on Oct. 26, where she took photos with some really creepy decorations.

On Thursday, the star shared a photo of a childhood Halloween celebration. Justice shared a photo of her young self in 1998 dressed as a princess.

Singer Demi Lovato made an appearance on "Girl Code Live", on Monday in a very unexpected but funny costume. Lovato showed up dressed as her version of a "Trap Queen" wearing a crown, sash and a long robe decorated in a variety of traps.

Christina Milian shared a photo of her and her "Grandfathered" castmates, including Josh Peck and John Stamos, all ready for Halloween in a variety of costumes.

Milian can be seen dressed in a leapard-print bodysuit with paint on her nose, making a fierce face.

Television personality Lili Estefan shared a few photos of herself and her "El Gordo y la Flaca" co-star Raúl De Molina in a few throwback photos from past Halloweens.

In one image Estefan and Molina are both dressed in disco-inspired costumes, and in another Estefan is pictured dressed as Catwoman.