Willie Geist
The audience was all shook up when Willie hit the stage as Elvis Presley.
Craig Melvin
The broadcaster channeled his inner champ when he dressed up as Muhammad Ali.
Jenna Bush Hager
The Today host show proved she could bring out her in powerhouse as the legendary Celine Dion. And that's the way it is.
Peter Alexander & Kristen Welker
Peter and Kristen said "yes" to channeling newlywed couple Jennifer Lopez and Ben Alffeck for Halloween.
Carson Daly
The TV host dressed up as legendary magician David Copperfield.
Al Roker
The weatherman impressed viewers when he hit the stage as Sammy Davis Jr.
Donald Faison's Daughter Wilder
The 7-year-old paid homage to her dad's 1995 movie Clueless and channeled Stacey Dash's character Dionne Davenport for her Halloween costume.
Scheana Shay
"Monsters Inc. & Boo," the Vanderpump Rules star wrote on Instagram.
Tyga
The hip-hop artist is ready to party at Unruly's 3rd Annual Halloween Party with Moonpay and Limitless.
True Thompson
"Owlette and Tigger aka True and Baby Brother," Khloe Kardashian wrote on Instagram as her son wore a costume from Pottery Barn Kids.
Camila Mendes, Lili Reinhart & Madelaine Petsch
The Riverdale actresses appear as the Sanderson sisters from Hocus Pocus.
Anderson .Paak
The Grammy winner's alter ego DJ Pee .Wee attends the Starchild Rooftop Bar & Lounge opening party at CIVILIAN Hotel.
Ella Balinska
The Resident Evil actress appears at Darren Dzienciol's CARN*EVIL Halloween party at a private home in Bel-Air, Los Angeles.
Mark Ronson & Grace Gummer
The Hollywood couple celebrates Halloween at The BOOM BOOM Room at The Standard, High Line.
Alessandra Ambrosio
The former Victoria's Secret Angel hosts Darren Dzienciol's CARN*EVIL Halloween party at a private home in Bel-Air, Los Angeles.
Becky G
The star appears at Darren Dzienciol's CARN*EVIL Halloween party at a private home in Bel-Air, Los Angeles.
Kendall Jenner
The model will make you never look at Toy Story's Jessie the same way again.