WASHINGTON – A holiday concert attended Sunday by President Barack Obama and his family included some non-traditional entertainment this year: a performance by South Korean rapper and Internet sensation PSY.

PSY – wearing an all-red outfit including a sparkling, sequined top – was backed by dancers wearing reindeer antlers as he performed his popular “Gangnam Style” dance, which mimics riding a horse.

The rapper, born Park Jae-sang, had apologized Friday for using what he called “inflammatory and inappropriate language” during anti-U.S. protests at concerts in 2002 and 2004. The flak from his remarks didn’t dampen the festive holiday mood Sunday.

Other performers at the charity concert included Diana Ross, Demi Lovato, “American Idol” winner Scotty McCreery and Megan Hilty, star of the NBC musical drama “Smash.”