Beyoncé shared the stage with mom Tina Knowles during her Cowboy Carter Tour in Los Angeles on Thursday, May 1, praising Knowles' new memoir 'Matriarch'

Beyoncé’s mother, businesswoman Tina Knowles, discussed her breast cancer diagnosis during an interview with “CBS Mornings” co-host Gayle King posted on Monday. Knowles, 71, said her physicians found two tumors in her left breast - one benign and the other with Stage 1 cancer - during a mammogram appointment last year.

Beyoncé invited her mom, Tina Knowles, onstage during the May 1 show of her Cowboy Carter tour. Beyoncé isn’t just her daughters’ protectors.