RIDGEWOOD, NJ - JANUARY 19: Kym Johnson signs copies of her new book "The 5678 Diet" at Bookends Bookstore on January 19, 2016 in Ridgewood, New Jersey. (Photo by Dave Kotinsky/Getty Images)
RIDGEWOOD, NJ - JANUARY 19: Kym Johnson signs copies of her new book "The 5678 Diet" at Bookends Bookstore on January 19, 2016 in Ridgewood, New Jersey. (Photo by Dave Kotinsky/Getty Images)