Beyoncé has shared a new theme song she wrote for her mother’s new Facebook Watch talk show Talks With Mama Tina.Tina Knowles’ new show premieres its first episode on the platform tomorrow (December 23), and will see her interviewing stars from Zendaya to Kevin Hart and Beyoncé’s former Destiny’s Child bandmate Kelly Rowland.The 40-second theme song is a bright and fun piece of music, and as Tina wrote on Instagram, it is sung by “my baby @beyonce and my beautiful grand babies,” referencing