United Kingdom, May 3 -- Beyonce and Solange Knowles' mom took them to therapy to help them get along better.

Tina Knowles recalled how her kids - who she has with ex-husband Mathew Knowles - started drifting apart when Beyonce was 11 and already a "little superstar" because she found her younger sister "irritating", so she decided an intervention was necessary.

Speaking at the LA Times festival of Books in Los Angeles last month, People magazine reports she said during a panel discussion: "Beyonce was this little superstar at seven or eight years old.

"She was winning all these talent competitions. She had this little sister come along. I think she was like 11 then, and she was getting super, super popular. Her sister felt like everyt...