Adam Levine and Behati Prinsloo kicked off their first Halloween [1] as husband and wife in coordinating ensembles, joining the group of celebrity pairs who have donned couples costumes [2]. A few months after Adam and Behati's star-studded wedding [3], the duo debuted throwback '80s looks at Adam and Maroon 5's 10th annual Halloween party in LA on Friday. While Adam went for a Mötley Crüe rocker look with long hair, makeup, and a jean jacket that showed off his arm tattoos and abs, Behati looked straight out of Olivia Newton-John's "Physical" music video in colorful athletic gear. The Victoria's Secret model even had a pink headband! At one point, Adam stole the spotlight by going shirtless [4] and hitting the stage with his bandmates. Lily Allen [5], Bill Maher, Mischa Barton [6], and Busy Philipps also attended the event at Sportsmen's Lodge. Keep reading to see their costumes, and don't forget to check out all the celebrity costumes [7] we've seen this year!

Adam had a shirtless [8] moment on stage.

Mischa Barton [9] dressed as a witch.

Bill Maher was covered up.

Lily Allen [10] wore white makeup and wore a braided wig.

Busy Philipps got cute with her husband, Marc Silverstein.