President Barack Obama shakes hands with South Korean musician PSY....

President Barack Obama shakes hands with South Korean musician PSY. (Getty Images) Credit: President Barack Obama shakes hands with South Korean musician PSY. (Getty Images)

The past is the past.

President Barack Obama welcomed K-Pop sensation Psy to a Christmas charity concert in Washington over the weekend, despite the anti-American lyrics Psy rapped at a 2004 concert in Korea.

Psy has apologized for the comments.

The performer, dressed in red sequins, performed his viral-hit song "Gangnam Style," which has been viewed on YouTube more times than any other video.

Hosted by Conan O'Brien, the concert also featured Diana Ross, Demi Lovato, Megan Hilty and past "American Idol" winner Scotty McCreery.

A combination of turning to the public and the FBI for help, and using cutting-edge DNA technology helped investigators finally identify Rex Heuermann as the prime suspect in the Gilgo Beach serial murders. NewsdayTV's Virginia Huie has the story.

How investigators cracked the Gilgo Beach murders case A combination of turning to the public and the FBI for help, and using cutting-edge DNA technology helped investigators finally identify Rex Heuermann as the prime suspect in the Gilgo Beach serial murders. NewsdayTV's Virginia Huie has the story.

A combination of turning to the public and the FBI for help, and using cutting-edge DNA technology helped investigators finally identify Rex Heuermann as the prime suspect in the Gilgo Beach serial murders. NewsdayTV's Virginia Huie has the story.

How investigators cracked the Gilgo Beach murders case A combination of turning to the public and the FBI for help, and using cutting-edge DNA technology helped investigators finally identify Rex Heuermann as the prime suspect in the Gilgo Beach serial murders. NewsdayTV's Virginia Huie has the story.

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