"He who must be called by your name," the rapper captioned his Voldemort photos.
Jonas and Turner paid tribute to 2003's The Lizzie McGuire Movie and were joined by Turner's The Staircase co-star Olivia DeJonge.
DeJonge dressed up as Lizzie McGuire, with Jonas as pop star Paolo and Turner as singer Isabella Parigi.
"Have you ever seen such a beautiful night?" Jonas captioned the image.
"Stay safe guys," Perry said.
Lizzo dressed as Grogu from Star Wars series The Mandalorian. The character is also known as Baby Yoda.
"A representative from Grogu's publicity team has issued a statement regarding the paparazzi photos taken last night. 'Grogu aka Baby Yoda aka The Child has no recollection of these events. In fact, these events never happened *Jedi hand wave*," Lizzo said next to photos of herself drinking and having a good time as Grogu.
Kelsea Ballerini portrayed restaurateur Guy Fieri.
"Flavortown USA #happyhalloween @guyfieri," Ballerini said.
Cardi B joined her 3-year-old daughter Kulture to dress up as matching witches.
"WE PUT A SPELL ON YOU NOW YOU'RE OURS," Cardi B said.
Niecy Nash dressed up as Kelly Rowland, with her wife Jessica Betts as Nelly from the music video for "Dilemma."
"It's a DILEMMA!!!," Nash said.
"Had to put on for the best Catwoman to ever do it," Saweetie said.