Girls Generation Makes Network Television Debut — Singing “Boys!” — Watch It Now!

They’re huge in Tokyo, and now they’re ready to show America what they’ve got… Meet Girls Generation!

The all-girl-group (consisting of nine girls!) made their U.S. debut on The Late Show with David Letterman last night, performing their hit single “Boys.” Dave also guests Regis Philbin and Bill Murray.

Watch their performance of “Boys:”

The girls’ performance started off a little shaky but they pulled through in the end, bringing all the sass and attitude a girl group needs! Then — just less than 12 hours after their “Late Show” appearance aired — the girls appeared on “Live! With Kelly” once again dancing up a storm with “The Boys” – though they lucked out with a bigger stage for them to shake their booties.

What do YOU think of Girls Generation? Can the K-Pop group break into mainstream?