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Sophia Bush, Maxim

Marcelo Krasilcic

Sophia Bush looks quite arresting on the April 2014 cover of Maxim.

The Chicago P.D. actress strips down for the men's magazine, wearing a mesh corset and, well, not too much else. But Bush is more than just a pretty face—she's a talented actress and an outspoken activist.

Bush, 31, uses social media to highlight a variety of causes and social issues. "I realized I could have a dinner party conversation with 15 people, and I could use Twitter to have that same conversation with a million," says the California native, who volunteers for Pencils of Promise and charity: water.

Given that she's consistently been on TV screens since 2003, the actress has amassed quite an online following. "Well, it's funny. It's not often that someone gets a job at 20 and then does it for a decade. Those are the years you're supposed to be growing and exploring new things," Bush says of her One Tree Hill days. "But this show [Chicago P.D.]? It feels like the job I was supposed to be doing."

Sophia Bush, Maxim

Marcelo Krasilcic

To prepare for her role as detective Erin Lindsay, a former confidential informant, Bush brushed up on creator Dick Wolf's other TV shows. "Well, I've watched his whole library, but I didn't sit and cram or anything. Although I did spend my Super Bowl Sunday watching a True Detective marathon on HBO."

The NBC drama shoots on location in the Windy City, which suits Bush just fine. "The restaurant scene is fantastic, and there a lot of great little bars," she says, noting that she hangs out with her co-stars regularly. "Our adventures are mostly about finding rare whiskeys and then dancing our faces off."

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