Grey's Anatomy star Ellen Pompeo shopped for groceries at Erewhon in Calabasas on Thursday in her first sighting since announcing her exit from the ABC medical drama after 19 seasons.The 53-year-old Golden Globe nominee went make-up free and sported black Marlboro sweats beneath a matching cardigan and white sneakers while toting a black purse.Ellen's reported $575K/per episode made her the highest-paid actress on a primetime drama for producing and starring as Dr. Meredith Grey in Grey's Anatomy.