Organizers of the Metropolitan Museum of Art's Costume Institute gala on May 5 might want to keep an eye on Amy Winehouse. A museum rep confirms to us that Winehouse has been asked to perform at the opening of the Armani-sponsored "Superheroes" exhibit, co-chaired by George Clooney, Julia Roberts and Anna Wintour. But perhaps organizers haven't seen that recent photo of the supposedly rehabbed Grammy-winner toting a bottle of vodka, or the one of her arms bearing curious scratches.

Winehouse's rep assures us that the marks are from her kitty. As for the vodka, well, maybe it's a good thing the Costume Institute has also reached out to other performers.

[r&m]