Read Tina Knowles Heartfelt Letter to Beyoncé, Solange, Angie Beyince and Kelly Rowland

Mother's Day is on Sunday and TIME magazine asked a few influential mothers to write open letters to their children. Although Tina Knowles gave birth to only two (Beyoncé and Solange), she considers Kelly Rowland and niece Angie Beyince as her own. 

"For Beyoncé, she acknowledged her compassion, generosity, and humility, while she admired her youngest daughter Solange for being a “rebel warrior.” As for Kelly, who is celebrating her first Mother’s Day this year, she recognized her kindness and loyalty."

Read this heartfelt letter from Tina Knowles to her kids below!