Knots Landing' stars Joan Van Ark, Michele Lee and Donna Mills are opening up about plastic surgery — and why the key to a "subtle" result is getting work done at an earlier age.

When farmers apply pesticides to their crops, 30 to 50% of the chemicals end up in the air or soil instead of on the plants.

Margot, 58, turned to Dr. Mike Nayak for a facelift, neck lift, brow lift and more. Here, they tell PEOPLE the background on the surgery.