Korean pop star PSY arrives in Memorial Church to speak at Harvard University in Cambridge, Mass., Thursday, May 9, 2013. Dozens of screaming and shouting Harvard University students have welcomed South Korean pop star PSY for a conversation inside an ornate church dedicated to the memory of those who lost their lives in World War I. (AP Photo/Elise Amendola) (credit:AP)
PSY(02 of06)
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Korean pop star PSY speaks in Memorial Church at Harvard University in Cambridge, Mass., Thursday, May 9, 2013. Dozens of screaming and shouting Harvard University students welcomed South Korean pop star PSY for a conversation inside the ornate church dedicated to the memory of those who lost their lives in World War I. (AP Photo/Elise Amendola) (credit:AP)
PSY(03 of06)
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Korean pop star PSY gestures as he speaks in Memorial Church at Harvard University in Cambridge, Mass., Thursday, May 9, 2013. (AP Photo/Elise Amendola) (credit:AP)
PSY(04 of06)
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Korean pop star PSY laughs during his speaking engagement in Memorial Church at Harvard University in Cambridge, Mass., Thursday, May 9, 2013. (AP Photo/Elise Amendola) (credit:AP)
PSY(05 of06)
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Korean pop star PSY speaks in Memorial Church at Harvard University in Cambridge, Mass., Thursday, May 9, 2013. Dozens of screaming and shouting Harvard University students welcomed South Korean pop star PSY for a conversation inside the ornate church dedicated to the memory of those who lost their lives in World War I. (AP Photo/Elise Amendola) (credit:AP)
PSY(06 of06)
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Korean pop star PSY arrives in Memorial Church to speak at Harvard University in Cambridge, Mass., Thursday, May 9, 2013. Dozens of screaming and shouting Harvard University students have welcomed South Korean pop star PSY for a conversation inside an ornate church dedicated to the memory of those who lost their lives in World War I. (AP Photo/Elise Amendola) (credit:AP)