Why was KARA's Gyuri absent from the '2011 K-POP Super Concert'?

On October 28th, girl group KARA performed the ending stage for '2011 K-POP Super Concert', which was held in the city of Busan. The girls performed their famous tracks, "Mister" and "Step". However, the audience was puzzled as to why only four members were present during the performance, as�Park Gyuri was nowhere to be seen.� A DSP Media representative explained, "Gyuri was unable to attend the concert due to her Japanese musical, '200 Pounds Beauty'." Gyuri's musical series kicked off with a bang recently,�and has been doing very well in Japan as it's sold out all of its shows. Aside from KARA, other well-known idols attended the event including�U-KISS, T-ara, Jay Park, ZE:A, SISTAR, AA, Kim Hyun Joong, Big Bang, Se7en, SHINee, and�Psy. Source + Photos: Osen via Naver