See what your favorite stars dressed up as in 2019.
Sarah Michelle Gellar/ Instagram
Mindy Kaling/Instagram
Noam Galai/Getty Images
Astrid Stawiarz/Getty Images
Steven Ferdman/Getty Images
Taylor Hill/Getty Images
Steven Ferdman/Getty Images
Noam Galai/Getty Images
Ben Gabbe/Getty Images
Vivien Killilea/Getty Images
Jim Spellman/WireImage
Vivien Killilea/Getty Images
Noam Galai/Getty Images
Ashley Tisdale/Instagram
Debra Messing/Instagram
Dakota Fanning/Instagram
January Jones/ Instagram
Molly Sims/ Instagram
Zoe Saldana/Instagram
Charlize Theron/ Instagram
Busy Phillips/ Instagram
Haim/Instagram
Camila Mendes/ Instagram
Chris Colfer/Instagram
Emma Bunton/Instagram
Dwayne Wade/Instagram
Chrissy Metz/Instagram
Kim Kardashian West/Twitter
Miley Cyrus/Instagram
Jim Spellman/WireImage
Craig Barritt/Getty Images
Jim Spellman/WireImage
Jim Spellman/WireImage
Taylor Hill/Getty Images
Steve Kazee/Instagram
Ciara/Instagram
Jessie Tyler Ferguson/ Instagram
Gabrielle Union/ Instagram
Kerry Washington/Instagram; Disney Channel
Beanie Feldstein/ Instagram
Neil Patrick Harris/ Instagram
HAIM/ Instagram
Tracee Ellis Ross/ Instagram
Lil Nas X/ Instagram
Kristen Bell/ Instagram
Gisele Bundchen/ Instagram
Kylie Jenner/ Instagram
Kate Beckinsale/Instagram
LeBron James/ Instagram
Demi Lovato/Instagram
Kevin Hart/Instagram; Dwayne Johnson/Instagram
Bruce Glikas/Getty Images
Tom Brady/ Twitter
Rose McGowan/Twitter
Michael Kovac/Getty Images
Tracee Ellis Ross/Instagram
Kourtney Kardashian/Instagram
Rachel Luna/FilmMagic
Gabrielle Union-Wade/Instagram
G-Eazy/Instagram
Elizabeth Hurley/Instagram
Kevin Winter/Getty Images
Ashley Graham/Instagram
Johnny Nunez/WireImage
Kelly Osbourne/Instagram
Michael Kovac/Getty Images
Heidi Klum/Instagram
Michael Kovac/Getty Images
Kevin Mazur/Getty Images
JC Olivera/Getty Images
Kevin Mazur/Getty Images
Kevin Mazur/Getty Images
Gilbert Carrasquillo/GC Images
Kevin Winter/Getty Images
Nick Viall/Instagram
