Korean pop star Psy has lived quite the life over the past few months. From winning awards for his hit 'Gangnam Style,' to performances around the world. But what's his favorite memory on the road?

Last night (Nov. 13) Psy joined Madonna on stage in front of a crowd of 20,000 at Madison Square Garden. Psy said performing with Madonna 'topped his list of great experiences.'

Psy flew in from Germany to join Madonna on stage. Over the weekend Psy performed at the 2012 MTV EMA's in Frankfurt, Germany. He also won 'Best Video' at the award show.

Madonna kept it classy durring her NYC show mooning the crowd for their 'undivided' attention as she spoke about the devastation caused by Superstorm Sandy. Audience members threw cash donations on stage as she sang 'Like a Virgin.'