I've seen BB King about 20-25 times dating back to the early 90's but haven't seen him since 2008. The last couple of shows were inconsistent where he would sing and play a lot in one show, but then the next he would just sing and not play much at all. So maybe each show just depends on his health. However, even the couple of shows that he didn't play much, it was amazing to watch how much vibrato he would get using just his pinkie finger.