Their name is Girls Generation. The nine-member group from South Korea was one of seven acts brought to New York by SM Entertainment who packed the arena at Madison Square Garden. .
Their energy, youthful beauty and catchy tunes shot them up the charts in Asia. Now they've set their sights on the U.S.
Their first English single called "The Boys" was released just last week but will it make Girls Generation a household name.
"Hopefully it will. We worked with Teddy Riley for the single. And he was very comforting and I think the result came out really well," said Girls Generation member Jessica.
The single is one thing, but is America ready for nine girls in one group?
"Definitely looking forward to U.S. fans liking Girls Generation because there's a variety of personalities and people so I think you can take your choice," said Girls Generation member Tiffany.
There's no shortage of choice when it comes to the growing number of so called K-Pop groups. Though there are more than a million Asians in New York and 14 million across the country their goal is to appeal to the broader U.S market -- something made easier by the power of the Internet.
"Five years ago it would be hard to imagine that people in Europe or all over the world would be listening to K-Pop," said Key of SHINee.
And five years from now we might be wondering what took so long in the first place.

Check out the video below.