Justin Bieber and Hailey Bieber celebrated Halloween in style by attending various parties dressed in creative costumes. They attended Vas J. Morgan and Michael Braun's Halloween Party in Los Angeles, where they dressed up as characters from The Flintstones. Justin went shirtless, wearing furry animal print fabric around his waist, and completed his look with a yellow cap similar to Bamm-Bamm's. Hailey wore a red wig and a sleeveless top with a bone detail, paired with a patent skirt. She made sure to include her "B" necklace, representing her and Justin's shared last name. Before the party, Justin also attended the Casamigos Halloween Party in Beverly Hills, dressing up in a beach-inspired outfit with a snorkel mask and flippers. Hailey had previously teased two Halloween costumes on Instagram, including a sexy vampire and a 90s fashion girl look. Last year, Hailey dressed as French model Laetitia Casta, recreating a YSL Haute Couture runway look. The couple celebrated their fifth wedding anniversary this year, with Justin expressing his love and admiration for Hailey on Instagram. Hailey has also mentioned that their styles sometimes don't match, but their relationship has grown stronger over time.