Photo: Andy Butterton/WireImage - Photo: Steve Granitz/WireImage
Sure, little black dresses are nice, but Scarlett and Sandra switch it up sometimes with little blue dresses. Scarlett wore a conservative navy Dolce & Gabbana getup to the London premiere of "Match Point" in 2005. (Fun fact: Scarlett planned on wearing a different dress that night, but it was confiscated by British customs!) And at the 2009 MTV Movie Awards, Sandra wore a sexy, sparkly cobalt minidress with shoulder applique.