I subscribe to the weekly Ken Jenning email trivia contest, and each week the 7th question is a real hard associative question. Help me out with this one, I haven't cracked it yet.
7. What unusual distinction is shared by these songs? "American Woman" by the Guess Who, "Glamorous" by Fergie, "Hollaback Girl" by Gwen Stefani, "I'm Back" by Eminem, "I'm Henery VIII I Am" by Herman's Hermits, "Lola" by the Kinks, "Safety Dance" by Men Without Hats, and "Turn On Me" by the Shins.