Sisters Marie Ceralvo and Mae Ceralvo, together with their friends Monica Castillo and Melissa Ruiz are the four girls from Vallejo, California that make up One Vo1ce. Aimee Castillo (no relation to Monica) was with the group for their first album, "Just the Beginning" and left before releasing their second, "Sincerely Yours." The five girls all began singing in church. But they got their start as a vocal group in a high school talent show, and decided to take it to the next level. They were signed by Bay Area indie label, Kamikaze Entertainment soon after.