Susan Powter

Susan Powter (born 22 December 1957) is an Australian-born American motivational speaker, nutritionist, personal trainer, and author, who rose to fame in the 1990s with her catchphrase "Stop the Insanity!", the centerpiece of her weight-loss infomercial.

She hosted her own talk show ''The Susan Powter Show'' in the 1990s. Provided by Wikipedia