~ Singers who sounded like a member of the opposite sex, when you first heard them
Ed Sheeran - Bad Habits: First hearing this on the radio, I thought it was a woman. (The video starts in a ladies' beauty parlor and he is a vampire. Props for that.) https://www.youtube.com/watch?v=orJSJGHjBLI
Jackson 5 - I'll Be There. I thought Michael Jackson was a girl or woman when I first heard this on the radio. He was still a kid. https://www.youtube.com/watch?v=W-apaIOOoAo
Post a link to the song, if you think of others.