It was a star-studded gathering for Christian's show at Top of the Rock in Manhattan on Saturday, February 9.
Mariska and Kelli sat among several other A-list actresses like Debra Messing and Danielle Brooks.
Other attendees included former Mad Men star Christina Hendricks and model Coco Rocha.
Mariska, who just celebrated her 55th birthday on January 23, opted for a sparkly black number for Christian's show.
Whose ensemble did you like more: Mariska or Kelli's? Sound off in the comments!