Add Yahoo as a preferred source to see more of our stories on Google. Lady Gaga has never been shy about standing up for the causes she believes in, even when it's caused controversy in her career.

But what if the story didn’t end there? In between legs of her “Mayhem Ball” tour, Gaga debuted “Apple Music Live: Lady Gaga Mayhem Requiem,” live directed by Micah Bickham, at Los Angeles’ Wiltern in ...