Nick Lachey & Vanessa Minnillo: Costume Party Pair

Nick Lachey and Vanessa Minnillo arrive at Beso for a party on Saturday (March 12) in Hollywood.

Vanessa rocked an ’80s look while Nick completed his ’70s-themed outfit with a ‘fro.

The engaged couple attended a birthday bash for their pal, actress Jennifer Birmingham.

“Ok! Here we go! Time warp to 1981 just for you @jennbirmlee! I love you! Happy Birthday!” Vanessa tweeted.

FYI: Jennifer married actor Will Yun Lee in October. Vanessa was a bridesmaid, while Nick served as the wedding singer!

10+ pictures inside of Nick Lachey and Vanessa Minnillo in costume…