Asada has said that the name Bonnie Pink is random and has no special meaning; she chose it because it was easy to remember and because she thought the words were cute together.

It introduced her unique style of music that has been defined as an off-beat mix between jazz, blues, pop, and rock.

On her fourth album, Let Go, she worked with Mitchell Froom, New York producer of Elvis Costello, Cibo Matto, and Suzanne Vega.

Golden Tears, which features the single "So Wonderful", came out in 2005,[3] and she performed at SXSW that same year as part of Japan Nite.

The single was a hit for both M-Flo and Bonnie Pink, and debuted at number 7 on the Oricon daily charts and reached number 9 on the Oricon weekly chart,[6] gaining Bonnie Pink another top 10 single.

Her single "Last Kiss", which appears as the last song on her greatest hits album, was the ending theme to the popular Gantz anime.

Bonnie Pink, shortly after releasing her previous single, began performing on popular TV music shows and promoting her latest single, "Water Me", which was the theme song for the popular TV drama Watashitachi no Kyōkasho ("Our Textbooks") a dark, melancholy drama about a young girl's suicide and the effect on her school.

In April 2008, Bonnie Pink made a guest performances for Domoto Tsuyoshi's solo project 244 Endli-x album I and Ai.

The English version of Bonnie Pink's single "Ring a Bell" was used as the theme song for the American release of the Xbox 360 game Tales of Vesperia.