The National Capital Area Chapter of Leukemia & Lymphoma Society's annual Leukemia Ball is already considered the largest non-political, black-tie gala in D.C. And with a headlining performance by Ms. Ross, it's no doubt they'll keep that title again this year. John Heffron, winner of NBC's Last Comic Standing, will also perform at the 24th annual event, expected to raise $3 million for blood cancer research and programs. It also includes a silent auction and a raffle to win one of two new Mercedes-Benz donated by local dealers -- and each raffle ticket is only $100. That's potentially a lot of car for the buck. Upside down, inside out, they got you. Saturday, March 12, starting at 6:30 p.m. Washington Convention Center, 801 Mt. Vernon Place. Tickets are $1,000. Call 703-399-2957 or visit leukemiaball.org.