Popsugar Celebrity Halloween Costumes 2018 Celebrity Halloween Costumes 2018 All the Celebrity Halloween Costumes We've Been Treated to This Year 1 November 2018 by Monica Sisavat Solís First Published: 24 October 2018 View On One Page Photo 8 of 100 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Justin Timberlake (@justintimberlake) on Oct 31, 2018 at 3:17pm PDT Share This Link Copy ← Use Arrow Keys → 8 Jessica Biel, Justin Timberlake, and Silas Timberlake as Harley Quinn, Robin, and Batman Previous Next Start Slideshow Halloween Costumes 2018Pop Culture Halloween CostumesCelebrity InstagramsCelebrity Halloween CostumesCelebrity CouplesHalloween CostumesHalloween