Christie Brinkley and her daughter Sailor Brinkley Cook are twinning and winning. Sailor, 27, who Christie, 71, shares with ex Peter Cook, took to Instagram on Monday, August 4, to show off her matching look with her mom while getting styled by Donna Karan, the founder of Urban Zen. Sailor rocked a plunging long-sleeved top that cinched at her waist. She teamed it with matching pants finished with a train. "Explain the look," Sailor told Karan, 76. The designer replied, "I'm so excited to have you here!" She continued, "This is the best dress because you can do it six different ways.