"I'M OBSESSED WITH..." A SPECIAL EDITION OF "20/20," TONIGHT, AUGUST 15 ON ABC

From losing weight to looking great to pampered pets to designer shoes, "20/20" takes a look at the latest and greatest obsessions. "I'm Obsessed With...," a Special Edition of "20/20" anchored by Elizabeth Vargas, airs on TONIGHT, AUGUST 15 (10:00-11:00 p.m. ET) on the ABC Television Network. Reports include:

"A Year Without Mirrors": In a world obsessed with image, Kjerstin Gruys has decided to avoid looking into the mirror not for a day, not for a month, but for an entire year. Six months before her wedding, in an attempt to avoid fixating on perfect, Kjerstin launched her project, "A Year Without Mirrors." Robin Roberts reports.

The Latest Diet Fad - Feeding Tubes: This past spring a new and controversial diet craze made headlines across the country. It's called the feeding tube diet. It first burst on the scene as a diet for brides who want to drop a few quick pounds before their wedding. Now the doctor who brought the feeding tube diet to America is crying foul, saying this is not a fad or voodoo medicine, it is instead the latest tool in the war on obesity. Dan Harris reports. (OAD: 5/11/12)

Why So Many Shoes? Beth Shak, 44, has a zeal for the high heel. Obsessed with designer shoes, she has over 1,200 pairs, with an average price of $800, meaning she's spent an estimated $1 Million. Amy Robach tries to discover... Why so many shoes?

Pampered Pets - Why Are We So Obsessed?: Robin Roberts reports on the extreme over-indulgences of pets in the United States and the real people and celebrities who are literally obsessed -- sometimes putting Fido and Fluffy before their own spouses. Plus, Lisa Vander Pump from "Real Housewives of Beverly Hills" talks about her little dog Giggy, who may be the most famous pampered pooch in the U.S. today. (OAD: 3/9/12)

The World's Most Talented Pets - Dancing Dogs: Jay Schadler takes viewers behind the scenes of the country's dog dancing competition circuit, showcased by one inspiring canine prancer who will leave you speechless. (OAD: 3/9/12)

Preview links: http://abcnews.go.com/2020

David Sloan is executive producer of "20/20."