Way before the wall fell, which was 91. But during Glasnost, certainly.
Billy was the first US rock star to play the Soviet Union with a full concert band. JD being the first American entertainer to perform there in 85, but it was just him and a guitar and, of course, he was not a rocker, but a folk singer. I've often thought it interesting that those are my two top guys... a strange coincidence.
Both of them have concert albums from the USSR, and both are excellent recordings.
"I got this guitar and I learned how to make it talk."