It's not unusual to hear female vocalists say they have been influenced musically by Etta James and Billie Holiday ... it's also safe to say that it's not unusual to hear female vocalists say they have been influenced by such legends as Willie Nelson and Merle Haggard. It is, however, unusual when those female vocalists are as young as Cirby, Carli and Celbi Manchaca, the three sisters who are Sister C. But they are not your "usual" female vocalists. That interesting mix of music genres and vocal styles is evident in the girls' song choices for both performing and recording -- classic rock to traditional country, sultry blues to contemporary pop, it's all there and they are surprisingly comfortable with all of them.