Before the amfAR’s Cinema Against AIDS Gala, celebs gathered on board Giorgio Armani’s boat to honor the extraordinary work of the cast and crew of the upcoming Doug Liman-directed thriller “Fair Game.”

Elizabeth Banks opted to wear a cobalt blue, jewel encrusted Giorgio Armani Spring 2010 strapless dress with a thigh-high split.

I love her fresh take on this look, as she wore the dress without the runway belt and the shimmering blue layered skirt.

Natalie Imbruglia wore a cute striped Emporio Armani Spring 2010 skirt paired with a white top.

Her nautical look was quite appropriate considering the event took place on a boat.

Emily Blunt went totally against the grain and opted for a white Dior one shoulder gown which had silver embroidery on the skirt.

When did it stop becoming a faux pa to attend a designers event wearing another designer?

Credit: Style.com, Giorgio Armani & Getty