Betsey Johnson: I think I was born with a bow ... Also, I have a lot of hair, and so I liked to adorn my hair in many ways. I liked headbands. I liked bows. I liked little flowers.

"The cartwheels and splits are a signature of mine," Betsey Johnson tells PEOPLE after breaking out the moves at her 80th birthday party last week in Los Angeles Glenn Garner is a form writer ...