Several by Buffy Sainte-Marie.

97 Men/Don't Call Me Honey
Summer Boy
A Man
Until It's Time For You To Go (but ONLY her version, and specially when she sang it torch-style, in the French language)

I also saw her do the Buddy Holly song "Oh Boy!" live at the El Mocambo in Toronto, and that was about the hottest thing I think I've ever seen done live onstage by a folksinger.