They really should have called the list "The 100 Currently Most Popular Singing Entertainers (except for folk, opera, Broadway, jazz, world music, and a whole bunch of other categories)."

Dylan makes their list but Baez doesn't?
Sly Stone makes it but not Ella Fitzgerald?
John Lennon is ranked higher than Patsy Kline, Jim Morrison, and Roy Orbison?

Using their criteria, I'm shocked not to see Leonard Cohen on the list of "all-time great singers." (sigh)

I'm sure you can come up with a lot of other outrages.