TRACKING DOWN DEADBEAT DADS, ON ABC NEWS� �20/20,� FRIDAY, NOVEMBER 4

Also: Celebrity Nicole Richie Discusses Her Weight, Drugs and Paris Hilton; The Perfect Fit� Intimate Talk About Lingerie; The Truth About Gas Mileage

What kind of father would walk away from his family and stop supporting his own kids? With the help of hidden cameras, �20/20� tracks down once successful dads who cry poverty, leaving their ex-wives and children in the lurch. ABC News correspondent Jim Avila�s investigation of deadbeat dads airs on �20/20,� FRIDAY, NOVEMBER 4 (10:00-11:00 p.m., ET) on the ABC Television Network.

�20/20� met two women with deadbeat husbands on the run from court orders to pay child support. These women ran out of leads and had all but given up, so �20/20� went undercover and spent months tracking the men down to find out why they abandoned their families.

Also: Millions got to know her as Paris Hilton�s sidekick in the TV hit, �The Simple Life��but Nicole Richie�s real life is anything but that. Richie talks to Deborah Roberts about �The Simple Life,� her broken friendship with Paris Hilton, her dramatic weight loss, growing up with her famous father, Lionel Richie, and what�s next for this young celebrity.

Plus: Lingerie has become one of the hottest markets in the fashion industry, with more than 500 million bras sold in the United States alone every year. With so many colors, styles and moods to choose from, no wonder women are getting the most important choice wrong� the right fit. Expert after expert told �20/20� that the majority of women buy the wrong size bra. So �20/20� spared no expense to help fix this feminine faux pas by taking viewers on the ultimate shopping spree -- where the world's celebrities, royalty and the very, very rich come to shop for the perfect fit � to the high priestess of French haute couture lingerie, Poupie Cadolle, to watch the making of one of the world�s most expensive bras. JuJu Chang�s report also features some helpful tips to get the perfect fit on any bra at any price.

And: It used to be that, when buying a car, the only number consumers cared about was the sticker price. Now, with gas prices so high, car buyers are also focusing on the miles-per-gallon number. But ABC News Correspondent Lynn Sherr has a warning: According to Consumer Reports, the Environmental Protection Agency (EPA) tests used to determine gas miles may not always be correct. Sherr reports on what to look out for, as well as tips on how to save gas.

Elizabeth Vargas and John Stossel are the anchors of �20/20.� David Sloan is the executive producer.