Singer Ke$ha performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas in September. Ethan Miller/Getty Images hide caption

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Beer pong and other drinking games are popular among teenagers, and play a role in binge drinking. iStockphoto.com hide caption

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Drinking on screen, even in a cautionary tale like The Hangover Part II, can encourage kids to try drinking, according to new research. Melinda Sue Gordon/Warner Bros. Entertainment Inc. hide caption

itoggle caption Melinda Sue Gordon/Warner Bros. Entertainment Inc.