Betsey Johnson (born August 10 1942 is an American fashion designer best known for her feminine and whimsical designs. Many of her designs are considered over the top and embellished. She also is known for doing a cartwheel ending in a split at the end of her fashion shows.Betsey Johnson (born August 10 1942 is an American fashion designer best known for her feminine and whimsical designs. Many of her designs are considered over the top and embellished. She also is known for doing a cartwheel ending in a split at the end of her fashion shows.