'What Makes You Beautiful' performance has Taylor Swift, Selena Gomez and even first lady Michelle Obama on their feet.

One Direction continued their Stateside takeover Saturday (March 31) at the Nickelodeon Kids' Choice Awards.

And there was no question about their popularity: The piercing screams from the crowd when their performance was announced was enough confirmation. The boys drove the girls even wilder when just their outlines appeared before they kicked into their song "What Makes You Beautiful" and emerged onstage.

Every girl in the audience — including Selena Gomez, Taylor Swift, Ashley Tisdale and their posse of ladies — knew all the words and sang along. Even first lady Michelle Obama couldn't keep herself from clapping!

The guys' dapper style was in full force, with each member wearing a different black-and-white look. Ginormous white bouncy balls went flying through the crowd throughout the performance, and the OD dudes finished their set by knocking a few of the orbs back into the audience with huge grins on their faces.

Even before their Kids' Choice performance, it was pretty clear One Direction were making a big impression on America. Just a few weeks ago, OD's Up All Night made Billboard history by becoming the first debut album by British group to enter the chart at #1, and the album also topped the charts in 15 other countries.

And their U.S. television appearances didn't begin and end with the KCA: One Direction promoted their first album on the "Today" show earlier this month, and next week, they will be the musical guests on "Saturday Night Live."

"We obviously get American TV in the U.K., and I've watched 'Saturday Night Live' before ... and 'Saturday Night Live' is a big, big deal, everyone knows that. And when we got invited on, we couldn't believe it," One Direction's Niall Horan told MTV News last week. "Again, we haven't spent a lot of time here, so a lot of people don't know who we are, so to be invited on such a prestigious American show is pretty amazing."

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