By Amy Ryan
January 27, 2007 at 05:28 AM EST

Another PopWatch HeadScratcher to get you through the weekend:

What do these five recording artists have in common?

Counting Crows
Grateful Dead
Rolling Stones
Talking Heads
Robbie Williams

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