Justin Bieber Joins President Obama at Christmas in Washington Concert

Despite of feeling a little under the weather, Justin Bieber performed for President Obama and his family at the 30th annual Christmas in Washington concert this Sunday.

It is a show which benefits the Children's National Medical Center. The night also featured performances by Jennifer Hudson, the Band Perry, "Victorious" star Victoria Justice and Cee Lo Green.

Host Conan O'Brien in an ironic way called Bieber saying, "It's especially exciting to be here during this joyous season, when we celebrate the arrival of a miracle child, worshiped by millions around the world, of course I'm talking about Justin Bieber". Bieber performed "Mistletoe" from his holiday album "Under the Mistletoe" during the annual event.

The night ended with all of the performers, as well as the Obamas and host Conan O'Brien, taking the stage for "Hark! The Herald Angels Sing."