Eva Mendes, Amy Adams

AP Photo/Evan Agostini; George Napolitano/Getty Images

Amy Adams and Eva Mendes know that shiny red dresses are always a hit around the holidays.

Both girls chose sleeveless, knee-length frocks for recent red carpet events, but only one actress spent almost $800 more on her look.

Think you know who gets a gold star for saving some money on her glam getup, and who went for broke? Test your style savvy here!