In a culture where “stage mother” has a negative connotation, and mothers aren’t always the most endearing characters on stage, it’s good to honor Mother’s Day by watching videos of Katie Boeck sing and Sandra Mae Frank sign “Mamma Who Bore Me” from Spring Awakening; Carol Woods sing “When You’re Good To Mama” from Chicago; the cast of “Mamma Mia” sing and dance to the title song; Alex Newell belt out “Mama Will Provide” from Once on This Island; Sophia Ann Caruso sing “Dead Mom” from Beetlejuice. Also: “If Mama Was Married” from Gypsy; “Mama I’m a Big Girl Now” from Hairspray; “Don’t Tell Mama” from Cabaret; “Mama Look Sharp” from 1776.