Watch Madonna go Gangnam Style as Psy joins her onstage

It was only a matter of time, and pop superstar Madonna invited the Korean sensation Psy to perform a mash-up of his hugely successful hit at a show in New York.

Psy joined the music icon on Tuesday night, at her second consecutive show at the famous Madison Square Garden.

They danced to his pop culture anthem Gangnam Style and to her jam Music in front of nearly 20,000 fans - and it was just as "mesmerising" as you might expect.

Madonna explained that Psy had flown "all the way from Frankfurt, Germany this morning".

She also said she was a big fan of the musician and loved his suit, which in his typically extravagant fashion was bright red.

He added that he's had a lot of experiences in the last few months, and that performing at Madison Square Garden with Madonna topped his list.

Madonna also collected money for those affected by Superstorm Sandy, with fans throwing money onstage at the multi-millionaire veteran entertainer while she sang Like a Virgin. She said she collected $3,000 at Monday's show.

People who read this story also read