Both Demi and Victoria dazzled on the red carpet as they arrived at the event, with Demi rocking a sequinned pant suit while Victoria sparkled in a blue Pamela Roland gown.
During the benefit, which raised funds for the Memorial Sloan Settering Cancer Centre, Demi also took the stage to perform some of her music for the other benefit-goers.
Earlier in the day, Demi tweeted about her excitement for the event, writing:
See you tonight @ard_foundation Excited to be a part of an amazing event and help raise money to fight cancer!!
— Demi Lovato (@ddlovato) September 7, 2017
Meanwhile, Victoria shared some snaps from the night on her Instagram page, writing: “Took a break from shows to support the @ardfoundation tonight. Cancer is a fight that we will never give up on & they are doing amazing things. #FashionWeek #Day2. Thank you @pamellaroland for having me & for this beautiful gown.”