By Amy Ryan
May 25, 2007 at 12:00 PM EDT

Another PopWatch HeadScratcher to get you through the weekend:

What do these five performers have in common?

Joe Cocker
Aretha Franklin
Marvin Gaye
Brenda Lee
Martina McBride

Your answer should be as specific as possible. Send your best guess to popwatch@ew.com.Be sure to write “HeadScratcher” in the subject line and include yourfirst and last names in your e-mail. We’ll post the most interestingresponses Tuesday afternoon.

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