 EX, was held on May 10, 2008 in Tokyo, Japan, and again on May 17, 2008 in Osaka, Japan as a part of Key's ten-year anniversary commemoration.The concert featured songs by Lia, Rita, Chata, and Tomoe Tamiyasu who have previously sung songs for singles and albums released under Key's record label Key Sounds Label (KSL).Another concert called KSL Live World 2010