There are at least two artists with this name

1) A female fronted Thrashcore band from Sacramento, CA.

2) Rose Ann Dimalanta, a.k.a rad., grew up in Oakland, California and began playing piano at the age of 4. In 1990, she completed her jazz studies at U.C. Berkeley. By this time, she had already played alongside Bay Area jazz greats like Pete Escovedo and was quickly recognized as an exceptionally talented pianist. In 1988, she met Sound Engineering student Michael Kirsch at the College for Recording Arts in San Francisco. The two were married in 1991 and Rose Ann moved to Kirsch's hometown Hamburg, Germany. In 1992, she started her solo project rad. with the first release radified on her husband's record label, Soulciety Records. The record instantly won critical acclaim and sold over 50 000 units independently. The following years brought collaborations with Tower of Power, Roger Troutman, Howard Johnson, Marc Russo of the Yellow Jackets, Sheila E. and others. After leaving the label Soulciety Records in 1996, both rad. and Kirsch moved back to the San Francisco Bay Area and started attracting an all star cast of musicians to the project, including jazz guitarist Ray Obiedo and Tower of Power drummer David Garibaldi. rad.'s band and live concerts have been a favorite among musicians everywhere and word about her talents traveled to Prince's Paisley Park in Minneapolis, MN. Prince invited rad. to join his band, the New Power Generation which she did for his Musicology tours in 2003 and 2004. rad. left the New Power Generation to focus more on her new born daughter and finish work on the album East Babe which was released on hers and Kirsch's label 7 Bridges Recordings in 2007. She has been touring in 2007 and 2008 with long time Prince saxophonist Eric Leeds and long time Santana drummer Billy Johnson alongside Jazz guitarist Ray Obiedo. A live album with this band "Live in Japan" was released in early 2008. rad. was joined by Patrice Rushen on her next studio album "Getting Down Is Free". After a brief stint with the Prime Time Band on NBC's Jay Leno show she returned to live touring in 2009.
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Artist biography from last.fm