One Voice (styled as One Vo1ce) is a Filipino-American R&B girl group that originated from Vallejo, California.

They originally started out as a quintet, which at the time included Aimee Castillo (no relation to Monica), and another original member named Lindsay Mangoba, but before anything was recorded she later left the group and was replaced by Melissa Ruiz.

The group released their first single "All Day All Nite" in October of 1998, it failed to chart.

The song was covered by singer Billy Crawford in 2002, where it became a hit in Europe.

Two more singles were released from their debut album "Boyfriend", and "Never Leave Your Side", however both songs failed to chart.

Only two singles were released from the album, but both "Swing Your Love 2 Me" and "So Badd" failed to chart.

In summer 2009, after a five-year hiatus, One Voice decided to make their return into the music industry.

[1] One Vo1ce appeared at the 15th Annual Filipino-American (Fil-Am) Friendship Celebration at the Serramonte Shopping Center, Daly City, CA on September 20, 2009.

On July 23, 2021, the trio would release their 4th studio album ISO, which contained the singles "What If", "Friendster", "Joy & Disgust", "Astro 101", and "Trapeze".