Gangnam Style singer Psy apologises for past anti-US songs

South Korean pop sensation Psy gestures from the red carpet as he attends the 2012 Mnet Asia Music Awards in Hong Kong on Nov 30, 2012. -- PHOTO: AFP

LOS ANGELES (REUTERS) - The South Korean pop singer behind the viral smash hit Gangnam Style apologised on Friday for past concerts featuring anti-American lyrics, ahead of a holiday performance to be attended by US President Barack Obama and his family.

Psy issued the apology after reports surfaced in the United States on Friday about his participation in two performances critical of the US military in 2004.

Psy's Gangnam Style video is now the most-watched clip ever on YouTube, with more than 900 million views since it was first uploaded in July.

"While I'm grateful for the freedom to express one's self, I've learned there are limits to what language is appropriate and I'm deeply sorry for how these lyrics could be interpreted," the rapper said in a statement.