Stephanie Madavane from France was declared runner up at the 26th edition of the beauty pageant held in New Jersey on Sunday.
Sangeeta Bahadur from Guyana took the third spot at the pageant that had contestants from 18 countries.
"I want to be the next biggest bridge between Bollywood and Hollywood," Ms Valli, 20, told news agency PTI, a day after winning the pageant. Her latest album was released a day earlier. She said her dream is to be a recording artist. Music, she said, is her passion. She started learning vocals at 8.
The beauty pageant attracts people of Indian origin from across the world. It provides a platform to showcase how Indian culture has been preserved thousands of miles away, she said.
"I definitely want to speak to a lot of young Indian-American women about women empowerment and positive self-image," Ms Valli said.
Sarita Pattnaik from Texas was declared Mrs India Worldwide. She is an interior designer by profession and mother of two children. She wants to be a social activist and become a voice for women's empowerment.
Organised by New York-based India Festival Committee, Miss India Worldwide is the only international Indian pageant with affiliates in over 35 countries and considered among the top ethnic pageants in the world.
Last year, it also launched Mrs India Worldwide, which provides a platform for married women of Indian origin.