Abs-olutely! Summer's Sexiest Six-Packs

From Nick Jonas to Jennifer Aniston to Shakira, see which stars are impressing with their taut tummies


The Parks & Recreation actor traded one six-pack for another to play an alien in the upcoming Guardians of the Galaxy. "Six months no beer," he captioned his impressive transformation on Twitter July 6, adding, "My brother made me post this."

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