Leah Dizon was born in Las Vegas, Nevada. Her parents were casino dealers. Her father was a business man in one of the largest cities in California. She has two older brothers, an older sister, and two younger brothers. She says she grew up listening to Rock and R&B music. She took dance lessons and was in her high school theater. Dizon dreamed of pursuing a career as a singer.
After graduating from high school, Dizon moved to Los Angeles and began her modeling career. While attending college as a film major, Dizon landed a phone company advertisement and posed for the cover features of various import-car magazines. This gained her much attention and a fanbase overseas, predominantly in East Asia. One year after her pictures were posted up on the internet, she already had 2,000,000 hits from search engines. Following the advice of her fans, Dizon sent a demo tape with photographs of herself to a talent agency in Japan and in April of 2006, after being accepted, she immediately moved to Tokyo. In October 2006, she released her first photobook titled Petite Amie (Girlfriend in French), which was ranked as the third best-selling photobook of 2006 and 2007.
On February 14, 2007, she released her first physical single, Softly under the Victor Entertainment label. It peaked at number #7 in the Oricon Weekly Chart. On the same day, she also released her second photobook titled Hello! Leah, which was ranked as the second best-selling photobook of 2007..
On May 30, 2007, Dizon released her second single Koi Shiyō (恋しよう♪, Koi Shiyō?), which also peaked at #7 on the Oricon Weekly Chart....