Slideshow: 5 Generations Of Supermodels

A month after a controversy in the modeling world over body weight, a second model has died after becoming dangerously thin.

Ana Carolina Reston, a well-known Brazilian model who worked for Giorgio Armani, died this week at the age of 23.

Reston was 5 feet 8 inches tall and starved herself down to 88 pounds during her battle with anorexia. The model ate only tomatoes and apples at the end of her life.

Reston had to be hospitalized because of a generalized infection. She had been a model since 13 and worked world-wide.

The issue of ultra-thin models has been a big topic of debate.

In September, Madrid's fashion week banned models considered dangerously thin from catwalk shows.

The ban in Spain came weeks after 22-year-old Brazilan model Luisel Ramos died of a heart attack moments after stepping off a catwalk.

Models auditioning for Madrid Fashion Week are now examined by doctors and those with a body mass index (BMI) that is too low are off the runway.

Models in Madrid need to have a BMI of 18 or higher to work there.

And the catfight over "zero sized" fashions may only intensify this fall.

In the U.S., Banana Republic and Nicole Miller will introduce "sub-zero" sized fashions for women this fall, taking skinny sizes to a new low.