Jackson's 'fury' over Knowles comment

Beyonce Knowles has reportedly upset fellow pop star Janet Jackson - by implying that her family were not from a high-class background.

Knowles appeared to put down the Jackson family in a recent interview with Elle magazine after stating: "I grew up upper class. Private school. My dad had a Jaguar. We're African-American and we work together as a family, so people assume we're like the Jacksons - but I didn't have parents using me to get out of a bad situation."