Stylephile giveaway !

UPDATE!!! In record time, we have a winner. Rose has won the Wrinkle Arrest with a correct answer of Madonna. Congratulations, Rose!

You don't need me to tell you that It was hotter than Hugh Jackman in a sauna yesterday. I hope you slathered on the sunscreen. Now that we're starting to spend more time outside, it's wrinkle season! To help ward off crow's feet and laugh lines, I'm offering a little prize, my chickens. It's Wrinkle Arrest, a "formula which helps reduce the appearance of fine lines, wrinkles, discoloration and other signs of aging."

Would you like to win it? Just tell me the name of the pop singer who will once again star in Louis Vuitton's fall ad campaign. Here's a hint: She's a material girl who recently attempted to adopt an African baby. Post your answer in the comments section. First correct answer takes it. Good luck!