Duh!

So I'm driving along, got the MP3 player on shuffle and this kick-ass blues tune comes on.  

"Wow," says I to myself, "this sounds almost like it could be the Allman Brothers Band, but not quite, good guitar-playing, though..."

So I get to a safe place where I can take my eyes off the road, briefly to see what's playing...

"Keys to the Highway" by Derek and the Dominos

 

 

Doh!