The human voice can be characterized into different types according to their vocal ranges, which refers to the span of the pitch a vocalist can produce without developing a glass screeching sound. They measure these range in units called octaves which refers to the higher or lower vocal notes. Singers have different vocal ranges among both men and women. Christina Aguilera is one such singer who has a vocal range that spans four octaves from C3 to C7 and according to Purenetworth her net worth is estimated at $180 million. She possesses incredible voice dexterity that allows her to easily jump between different vocal ranges. Her light feminine speaking voice could add up to her song to develop a weighty tone.