Musicology

For some reason, my kids love that Cher song, "Believe" - you know, the one from 1998.  Although we've been listening to it for months now, I only recently learned that there was some confusion about the singer's identity:

Margot:  "Is this singer a man or a woman?"
Claire:  "It's definitely a man."
Me:  "Actually, it's a woman."
Jane:  "What?!  I thought that was Usher."