Beyonce's mother Tina Knowles files for divorce from 2nd husband

Beyonce's mother and businesswoman Tina Knowles has filed for divorce from her husband, actor Richard Lawson. Knowles, 69, filed for divorce on Wednesday citing irreconcilable differences, and listed their date of separation as Tuesday. It marked the second marriage for both Knowles and Lawson, who began dating in 2013.