US - For the first time America's top beauty queen is a woman of Indian origin, a first partly clouded by a spate of hateful Tweets branding her an Arab terrorist.

The new Miss America is Nina Davuluri, a 24-year-old from the state of New York who wants to be a doctor.

She called her crowning Sunday night at the Atlantic City pageant, in which she performed a traditional Bollywood-style dance, a victory for diversity in America.

"It was the first time Bollywood has been performed on the Miss America stage. It's an honour for myself and my community," Davuluri told ABC television Monday morning.

"Halfway through, I just started crying because you know, it was such an incredible experience being on that Miss America stage," she said. "It was so meaningful and powerful."

Davuluri was beaming despite a spurt of racist tweets about her.

"I have to rise above that," she said at a news conference Sunday night after being crowned. "I always viewed myself as first and foremost American."

While many American saluted Davuluri's victory, some online commenters described the beauty queen, who is believed to be a practicing Hindu, as an Arab who looks like a terrorist.

One user said "It's called Miss America. Get outta here New York you look like a terrorist. #bye #americanforamerica."

A person who apparently tweeted from Kansas wrote, "Are you serious??!!! The Arab wins??!!! This is miss AMERICA!!! Not miss Arabia!!! Miss Kansas is in the army and is a country girl!!! C'mon."

Others, like the Jezebel feminist blog, denounced the comments, saying "racists are being racist because Miss America isn't white."

"This world is so ignorant. #MissAmerica Indian or not had every right to gain the title of MissAmerica. This is why I want to leave America!" chimed in @CJlovebug.

Davuluri competed on the platform issue of "celebrating diversity through cultural competency."

"I'm so happy this organisation has embraced diversity," she said at the news conference. "I'm thankful there are children watching at home who can finally relate to a new Miss America."

During her 2014 year of service as Miss America, she will travel extensively to speak to audiences about her chosen issue.

The University of Michigan honour student will also serve as the official national goodwill ambassador for the children's charity group Children's Miracle Network Hospitals.

Along with her much-prized title, Davuluri won a $50,000 (S$63,000) scholarship to pursue her education.