411 Mania — Seriously, PSY is everywhere… more info

Brooklyn Vegan — Madonna at MSG - 11/12/12 (more by Dana (distortion) Yavin) Madonna played her second of two Madison Square Garden shows last night (11/13), and while Lady Gaga definitely didn't make an appearance, in probably more exciting news, "Gangnam Style" Psy... more info

Prefix — Not only has PSY hit the big time with his song "Gangnam Style" all around ... Read the full article at http://www.prefixmag.com/news/watch-psy-performans-gangnam-style-with-madonna/71969/ more info

Mjsbigblog — K-Pop superstar Psy joined Madonna on stage for a little dancing last night in New York City. Do you think this is officially the death of the Gangnam Style meme? more info

E! Online — Hey, Mr. DJ: Put that "Gangnam" guy on! Madonna gave her New York City audience a showstopping surprise Tuesday when she trotted out galloping Korean sensation Psy for a joint... more info

Topix — Korean pop star PSY joined the pop icon Tuesday night during her second show this week at Madison Square Garden. more info

Starpulse — Madonna thrilled fans at her New York City show on Tuesday by introducing South Korean star PSY as her surprise guest. The Material Girl was performing her hit Give It 2 Me when PSY appeared onst... more info

ContactMusic — Madonna in one of her less revealing stage outfits at Madison Square Garden last night (November 13, 2012)Madonna called in to New York's Madison... more info

ContactMusic — Madonna thrilled fans at her New York City show on Tuesday (13Nov12) by introducing South Korean star Psy as her surprise guest.The Material Girl was... more info

Guardian Music — South Korean pop sensation Psy joins Madonna on stage in New York to perform his hit Gangnam Style more info