Johnston grew up in the United States attending summer music camps, dance and voice classes before enrolling at Cheyney State University as a music major. Johnston released her debut albumPeace in 1992 with lead single, "Peace", reaching the Top 10 in the UK.  Further singles "Friendship", and "I Wanna Sing", followed with positive reactions on Billboard’s Top 100 and the Dance/Club followers and fan-base.  A second album, Sabrina, was released in Japan only in 1996 and again in 1998 under the title Yum Yum; the only single released from the album, "Reasons", did not chart in the UK. Johnson made an appearance as a backing vocalist on Lauryn Hill's "To Zion", from the album, The Miseducation of Lauryn Hill.