Haim teamed up with the LA-based clothing company Reformation to create a 10-piece New Year’s Eve collection. Este, Danielle, and Alana Haim worked together to co-design the ensembles, which were based on the iconic looks of Cher, Bianca Jagger, and Diana Ross, according to Fashionista. The sisters made the following statement about the collaboration:

WE’RE LONGTIME FANS OF REF AND IT’S AWESOME TO CELEBRATE THEIR MISSION OF SUSTAINABILITY AND WORK TOGETHER WITH LIKE-MINDED WOMEN. AS FAR AS THE COLLECTION, NYE IS THE HOLIDAY THAT’S ALWAYS OVER-HYPED, BUT REF CLOTHES MAKE YOU WANT TO GET DRESSED AND GO OUT — SO IT WAS FUN CREATING OUR OWN VERSION OF THAT.

A few pieces from the collection are pictured in the photo above. Check out more of the looks here.