Britney Spears, Jessica Simpson, J. Lo—and now Madonna? The venerable queen of pop is gearing up for her own fashion lines, following in the footsteps of younger pop stars. The designs, which would be sold exclusively at Macy's, would include clothing, accessories, lingerie, and footwear. Madge is reportedly leaning toward calling her apparel line Material Girl, and the underwear line Truth or Dare. The brand-management firm Iconix Brand Group is said to be negotiating the venture with Madonna. Iconix tallies up $10 billion in annual sales, thanks in large part to its licensing agreements with Candies, Rampage, Badgley Mischka, and others. Celebrity does not always transfer to retail revenue, however, as Jennifer Lopez's and Paris Hilton's collections have long struggled. Madonna is admittedly in another league—the star has appeared in many advertising campaigns for couture labels (including this spring's Dolce & Gabbana campaign) and even created a successful co-branded line for H&M under the banner "M by Madonna."