Nathatai Saengpetch (Faii) graduated from the Faculty of Communications from Rangsit University. She started singing lessons with Karn Janthong since eleven years old. At 13, she won the Panasonic Star Challenge and became an artist for RS Production the following year.

Nathatai released her first album when she was 16 and had subsequently released eight albums: Amfine, Hifine, Amfine day, Doubt, Little room, Drama, Myself and Focus.

Nathatai has been invited to sing with various institutions including the Royal Air Force Orchestra, and The Medical Society. She was selected by Chulalongkorn University as one of the twelve singers to sing in the project to celebrate the King's 84th Anniversary. She has also been invited to represent Thailand to sing in Singapore, Taiwan, Japan and Malaysia.