http://www.youtube.com/watch?v=eklmyx8Dy6Iendofvid[starttext]Snippet of Justin Bieber singing 'Someday at Christmas' in front of President Barack Obama has arrived for viewing pleasure. Justin Bieber's performance on "Christmas in Washington" concert will not be televised until December 20 at 8 P.M. ET/PT. However, his fans can take a peek at his stage act days prior to the air date as clip from the gig has hit the web. Sporting a dark-colored sweatshirt, the YouTube singing sensation delivered a holiday tune called "Someday at Christmas" with a choir backing him up. "Like you, Mr. President, this young man has many fans trying to shake his hand without permission," so host George Lopez said when introducing his performance. In addition to the solo set, Justin also took the stage alongside his mentor Usher for a duet performance. Other musical guests on the gig were Mary J. Blige, Rob Thomas, Neil Diamond and Sugarland. Taking place at the National Building Museum on December 13, the concert is aimed to benefit the National Children's Medical Center and was attended by President Barack Obama and first lady Michelle. Hours before singing on the concert, Justin jokingly wrote on Twitter, "Yeah im nervous. if i mess up he [Obama] might deport me back to Canada." Post content here [endtext]
