I found Jonghyun's shirt from the Jan. 15 Music Bank performance
(Thanks to OIAM for the Jonghyun pic XD)Jonghyun is wearing RockSmith's 1991 White tee.
Get it here for $12
♪Nikki
Credits: K-World style, atticonlineshop, Rocksmith, OIAM
Picture Sources:
SHINee Soompi Forums
http://www.atticonlineshop.com/Rocksmith--1991-White-T--Shirt_p_3492.html