Psy continued on with his scheduled appearance at the "Christmas in Washington" charity concert on Sunday, shortly after apologizing for performing anti-American policy lyrics in 2004. Psy apologizes for viral anti-American lyrics The South Korean musician, famous in the States for "Gangnam Style," was joined by Diana Ross, "Smash's" Megan Hilty, "The Voice's" Chris Mann, … Continue reading Psy performs at 'Christmas in Washington' post-apology