The annual Mercedes-Benz Polo Challenge will kick off at the JetOne Jets Field at the Bridgehampton Polo Club on Saturday, July 19 this year. This season's partners include Coca-Cola, Fiji Water, T-Mobile, Pernod Ricard, Ralph Lauren, Hpnotiq and Zino Platinum Cigars, and the MVP Player Award will be presented by Westin Rinehart. The matches, which will run for six consecutive Saturdays through August 23 this year, are the social mainstay of the Hamptons season and feature some of the world's best polo players competing for one of the sport's most treasured prizes. Anyone can watch from the stands, but the invitation-only V.I.P. tent is the real scene. Celebs in attendance in years previous have included Anne Hathaway, Elizabeth Hurley, Heather Graham, Howard Stern, Jared Leto, Jay Z, Jessica Alba, Mischa Barton, Natalie Portman and Prince Albert of Monaco, to name a few. All proceeds will go to a good cause, the South Fork Breast Health Coalition.

AIDS is officially 25 years old and sadly in many ways it's as strong and as deadly as ever. In certain parts of South Africa as much as 41% of the population is afflicted with AIDS, and worldwide 90% of the people who have it don't know it. Ignorance is one of the biggest hurdles in treating and controlling the spread of AIDS, and Keep a Child Alive is an organization focused on helping with both education, treatment, and prevention of this devastating disease -- not to mention support of the children left in its wake.

To date over 15 million children have lost one or both parents to the AIDS pandemic, and for just $1 a day you can buy the drugs needed to keep a child alive.

If you've got a teenager on your holiday list you might want to check out the 17 items from Seventeen magazine being auctioned off on eBay this week. The magazine is donating fashions from 17 young celebrities of 2007 to a charity auction benefitting the Make-A-Wish Foundation.The celebs appear as "Style Stars" in the December/January double issue. Items from the "Style Stars" and clothes worn during the Seventeen photo shoots are being auctioned from November 15 - 25. Celebs on the young and hot list are: Jessica Alba, Beyoncé, Ashlee Simpson, Avril Lavigne, Fergie, Rihanna, Pink, Hilary Duff, Lauren Conrad, Vanessa Hudgens, Jordin Sparks, Mary Kate & Ashley Olsen, Amanda Bynes, Hayden Panettiere, Emma Roberts, Lil Mama and Aly & AJ. Items include a fedora from Ashlee Simpson, Gucci boots from Pink, a Giorgio Armani tote from Jessica Alba, and an entire outfit from Hilary Duff's closet and Rihanna's Moschino Cheap & Chic dress that was worn in the photo shoot.