Tina Knowles-Lawson and Mathew Knowles have been very influential in the lives and careers of their two daughters, Beyoncé and Solange Knowles ... group and Beyoncé's manager for over a decade.

"When Beyoncé and Solange showed an interest in music ... "Rather, we encouraged them, we guided them, we supported them." Knowles was a manager for both of his kids, as well as manager of ...