Cameron Diaz, Jason Segel, Mila Kunis and more will stop by the primetime talker
The pop star's hit single "Gangnam Style" was the first YouTube video to cross one billion views
The MLB team's former manager didn't even crack a smile when the "Gangnam Style" singer performed a few feet away from his seat
The artist's "Gangnam Style" follow-up blew past Justin Bieber's "Boyfriend" on Saturday to score the record for most first-day YouTube views a song has ever...
Watch -- or get a second look at -- the commercials that will air during Super Bowl XLVII on Sunday
Psy's music video for his "Gangnam Style" is the first YouTube video ever to hit a billion
Facebook, presidential candidates and daredevil Felix Baumgartner also were hot topics in the top-trending videos of the year
South Korean singer PSY reportedly rapped that Americans should die "slowly and painfully" during 2004 performance
A breakdown of his YouTube ad revenue, iTunes sales and television commercial deals show the K-pop star is making millions
Diana Ross, Demi Lovato, Scotty McCreery and others will also perform at the Conan O'Brien-hosted "Christmas in Washington"
Viral YouTube video features Christmas lighting display blinking to the beat of Psy's "Gangnam Style"
Psy's hit single has accumulated more than 826 million views on YouTube, compared to the 805 million for Justin Bieber's "Baby"
That one song you don't like gets mashed up with that other song you don't like