April 13, 2012 -- intro: Celebrities aren't above enduring a little embarrassment for the right price or a good cause.
In a new commercial for Depend adult diaper brand, "Days of Our Lives" actress Lisa Rinna shows off her famous pout and posterior while posing on the red carpet in a form-fitting dress -- with Depend's new Silhouette for Women underneath.
"I am wearing an evening gown for God's sake! And you can't tell I have it on. Check out the booty!" Rinna gushed turning around. "It feels great -- and they're so soft."
Even her husband, Harry Hamlin, put the product to the "touch test," running a finger down her backside. "You can't even tell she's wearing it," he declared.
Rinna, 48, insists she has nothing to be ashamed of.
"I am a champion for positive self-image for women," she says in the ad. "The new Silhouette makes a woman feel confident, and it's fashionable.
Moreover, Rinna is endorsing the brand for a good cause: Depend maker Kimberly-Clark agreed to donate $225,000 to Dress for Success, a charity she supports.
"I don't endorse many products," Rinna, who does not personally wear adult diapers, told Popeater's Rob Shuter. "When I was first asked, I was surprised. I'm not the first person you think of when you think of Depends. That's what I love about it. I believe women should feel good about themselves and if that means they need to talk about their problems, then absolutely. We need to help each other. I was not afraid to do this."
Click through to see six other celebrities who have put shame aside to endorse products and tackle topics most people would be too embarrassed to talk about in public.
quicklist: 1 category: title: Kim Kardashian for TRIA hair-removal system url: text: Kim Kardashian admits to being a hairy Armenian, which is why she is standing by TRIA, a home laser hair-removal system she began endorsing in 2010. Beauty company Radiant, which makes competing product, no!no! hair, is suing TRIA and Kardashian for what it says are false claims by the reality star that TRIA works all over the body and yields permanent results. But, according to TMZ, Kardashian insists in the latest court documents that everything she has said about TRIA comes from her own experience. "Being Armenian and hairy, I thought [TRIA] was the perfect product," she says in the documents. media: 16125949
quicklist: 2 category: title: Wynonna Judd for Alli url: text: Wynonna Judd from the mother-daughter country duo the Judds has long struggled with her weight, so it wasn't too surprising when she signed on to flak weight-loss pill Alli in 2009. Unfortunately, the pill quickly became known for its "anal leakage" side effect. media: 16125393
quicklist: 3 category: title: Jamie Lee Curtis for Activia url: text: Jamie Lee Curtis has taken some ribbing since signing on as Activia's spokeswoman. Just check out "SNL" star Kristen Wiig's side-splitting impression of Curtis proudly "pooping her pants" while filming an Activia commercial. Curtis appears in the real commercials for the Dannon yogurt, which claims to aid your digestive system and help you become more, ahem, regular. media: 16125871
quicklist: 4 category: title: Mark Martin for Viagra url: text: Former Republican presidential candidate Bob Dole broke ground as the first celebrity to endorse Viagra. These days, the erectile dysfunction pill has 53-year-old NASCAR star Mark Martin as a spokesman. In a commercial for Viagra, Martin zips around the track in a racecar emblazoned with the brand name. As he exits his car and removes his helmet, he quips, "Who'd you expect Bob Dole?" media: 16125321
quicklist: 5 category: title: Kirstie Alley for Poise url: text: Kirstie Alley is no stranger to product endorsement, but her latest assignment has her talking about "light bladder leakage" and "period pads" as well as donning a pair of wings as the so-called Poise fairy. Lurking in stranger's bathrooms, Alley offers Poise to women who experience "drizzle" while running on the treadmill or laughing at a joke because, she says, "your period pads are for your period. Period." media: 16125383
quicklist: 6 category: title: Florence Henderson for Polident url: text: Florence Henderson has no problem flashing her Brady-perfect smile as the longtime spokeswoman for Polident, the best-selling denture cleanser. That's because her pearly whites are the real deal. "I have always loved to smile and I'm so grateful that I was born with good straight teeth," Henderson told Dear Doctor, an online magazine for dental health. media: 16125936