Um, HBO?

I was checking out the lineup for the concert celebrating the inauguration of a politician from the South Side of Chicago. I found this:

Beyonce
Mary J. Blige
Bono
Garth Brooks
Sheryl Crow
Renee Fleming
Josh Groban
Herbie Hancock
Heather Headley
John Legend
Jennifer Nettles
John Mellencamp
Usher Raymond IV
Shakira
Bruce Springsteen
James Taylor
will.i.am
Stevie Wonder

How Garth Brooks gets on that list, and not a single blues musician, is so far beyond me I can't begin to describe it.
Buddy Guy?
Koko Taylor?
I could go on. Those are just two musicians from Chicago who you could call on. And those are off the top of my head. And who does HBO get? Garth Brooks.

The more things change, etc.