Was just checking out who is playing in Korea this year and was pleasantly surprised to see Bob Dylan was on March 31.
Other artists include (love them or loathe them!)
Chicago - Feb 23
Backstreet Boys - Feb 24
Basement Jaxx (DJ Set) - Feb 27
Jeff Beck - March 20
Brian McKnight - April 1
Tom Jones - April 2-3
Kings of Convenience - April 4
Swell Season (couple from movie Once) April 7
Pat Methney - June 2-4
All of the above are in Seoul (of course)
There is also the Jisan Rock festival in July, but unable to find anything out about the lineup yet.
More details here http://www.koreagigguide.com/concert-calendar/
and tickets usually available here http://ticket.interpark.com/Ticket/Goods/GoodsInfo.asp?GoodsCode=10001023
(it's a foreigner friendly website if you have basic Korean)