Dressed in tight white jeans, black boots and a riding hat, you'd be forgiven for thinking Miley Cyrus was going horseriding in the country.

Instead, the 15-year-old star wore the equestrian-inspired outfit to perform to thousands of fans at an outdoor concert in New York City.

The Hannah Montana singer/actress was up bright and early this morning to perform in the Rockefeller Plaza on U.S. live morning programme Today Show.

Giddy up: Miley Cyrus looked like she was ready to go horse-riding as she arrived at the Rockefeller Centre in New York City for a concert today

In a scene reminiscent of Beatle-mania in the 1960s, screaming 'tweens' were kept back from Miley and her dancers by crash barriers.

Miley belted out tracks from her latest album Breakthrough, including 7 Things and See You Again, much to the delight of her ecstatic fans.

Following her energetic performance, the pretty teen happily signed autographs and posed for photographs with a selected lucky few who were able to get close enough to their idol.

Drawing the crowds: Miley Cyrus sings tracks from her new album at the Rockefeller Plaza in New York City

Speaking to Today hosts, Miley admitted she couldn't sleep the night before because she was so nervous.

She said: 'Last night I had just an hour and a half sleep. But I walked out there and heard the crowd scream - and I was ready.'

Miley was thrilled with the huge response by fans, admitting she didn't think she would draw such a big crowd out of her Hannah Montana persona.

Following her Rockefeller performance, Miley moved on a few blocks to Central Park, to launch the Bolt Across America fund.

Bolt Across America, linked to the forthcoming Disney film of the same name, aims to find homes for homeless pets.

Miley-mania: The Hannah Montana and her dancers walk to the stage causing a frenzy amongst her young fans

Rocking out: Miley lets her hair down