What celeb doesn't love a good costume opportunity?
What's a good costume?
What's a bad costume?
Here are some more great ones from Hollywood and beyond.
And don't forget to send us yours. You're a star... in our eyes at least.
Lace Bass and fiance Michael Turchin teamed up as "Wayne's World" hosts Wayne and Garth with pals, Adam Lambert and former "Queer Eye for the Straight Guy" host Jai Rodriguez.
"Modern Family" actress Sarah Hyland and beau Matt Prokop dressed as "Walking Dead" characters Maggie and Glenn.
Miley Cyrus channeled another scandal of VMAs past with her Lil' Kim-inspired costume.
"Spring Breakers" star Vanessa Hudgens arrived as an angel, then ran into her manager, Evan, dressed as Alien.
"Glee" star Lea Michele was a Bavarian sweetheart with pal Jennifer Switch.
Nicole Richie went as Dannie DeVito in "Twins."
Josh Duhamel and wife Fergie went to Kate Hudson's star-studded Halloween celebration as Elvira and Riff Raff.
And then Ed Sheeran was something terrifying.
Who were your favorite celebs dressed as this Halloween? Tweet us your faves at @BostonAE or leave them in the comments here.
About Pop RadarBoston.com's entertainment staff brings you the latest celebrity news and pop culture updates, along with discussions on the day's hot topics. And you're invited to weigh in. Let's dish.
ContributorsKatie McLeod is Boston.com's features editor.
Kristi Palma is a producer for Lifestyle and Arts & Entertainment at Boston.com.
Rachel Raczka is a producer for Lifestyle and Arts & Entertainment at Boston.com.
Emily Wright is an Arts & Entertainment producer at Boston.com.