It is commonly accepted that Hollywood is like high school, and if that’s true, then summer classes are more important here than anywhere else: Short of the awards season, celebrities are rarely so visible as they are during summer blockbuster movie season, and their suitcases rarely so full. In the back-to-school spirit, we’ve prepped red-carpet report cards for the globe-trotting stars of 2012’s summer tentpoles. Because, be it Emma Stone or Channing Tatum or Scarlett Johansson, someone’s going to wind up being this summer’s sartorial Valedictorian, and someone (spoiler: ScarJo) will land in fashion detention.

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