President Barack Obama says the holiday charity concert that he and his family attended Sunday night was "a chance to get in the Christmas spirit, spread some joy and sing along with artists who have much better voices than we do."

resident Barack Obama shakes hands with South Korean musician PSY (C), next to host Conan O'Brien (L) and performer Scotty McCreery (R) during the "Christmas in Washington" concert at the National Building Museum. (Molly Riley-Pool/Getty Images)

The 31st annual "Christmas in Washington" concert that benefits Children's National Medical Center was held at the National Building Museum and was hosted for a second year by comedian Conan O'Brien.

Obama says the holiday season is a time to remember that everyone is "incredibly blessed in so many ways," and to share with the less fortunate, such as those in hospitals, shelters and battlefields far from home. As he puts it, "Those blessings aren't just meant to be enjoyed, they're meant to be used and shared with those who have less."

Among the people performing at the event were South Korean rapper and Internet sensation PSY who performed his popular "Gangnam Style" dance, Diana Ross, Demi Lovato, "American Idol" winner Scotty McCreery and Megan Hilty, star of the NBC musical drama "Smash."

The concert is scheduled to air Dec. 21 on TNT.

(Copyright 2012 by The Associated Press.  All Rights Reserved.)