Spotted! Madonna rocking the green ostrich feather dress from Louis Vuitton’s Spring/Summer 2009 collection as she attended the dinner to celebrate Gucci’s launch of the Tattoo Heart Collection at New York City’s Plaza Hotel on Wednesday, November 19.

So, she’s starting to wear Vuitton in public events, looks like Madonna’s had a good time shooting the LV’s upcoming ad campaign. Watcha think of her outfit? Yay or nay?

These photos are also the basis for the fake LV Spring 09 ad campaign that is floating around the internet right now. Check out Madonna’s bottom half after the jump…

Image via Just Jared