Jessica Biel and Justin Timberlake attended the Casamigos Halloween party on Friday night ... a wig that resembled her husband's short curls during his time in the iconic boy band.

Ahead of their couple's night out, Justin also celebrated Halloween when attended the Casamigos ... That Was a Turnoff for Her Husband: Only Time He 'Hasn't Wanted to Kiss Me' Kim Kardashian ...

Join Justin and Robert and listen to the Halloween party special podcast as they throw a spooktacular Halloween party, and you’re invited!

Justin Bieber and Hailey Bieber are celebrating their first Halloween with son Jack Blues ... She also admitted she was ...