Emmy, Jessica and Claire at the 2010 Museum Dance

Emmy Rossum at the 2010 AMNH Museum Dance held at the American Museum of Natural History on April 15.

Emmy wore a sparkle topped dress from the Luca Luca Fall 2010 collection.

For a similar, and affordable, look like Emmy's try pairing the grey chiffon $24.99 Arden B skirt with a black top and some simple black peep-toes.

Model Jessica White was stunning in a grey strapless gown - it looks very similar in style to Zoe Saldana's Givenchy Oscars gown but I'm not sure on the designer.

And Claire Danes wore the same pink Zac Posen for Target gown that she wore to the collection's party the same night.

Pics from Getty and Zimbio