MBC's Chuseok special, 'Idol Star Athletics Championships', is back for the third time, and they've just revealed the line-up of its participating idols. The first recording will be held on August 27th at the Jamsil main stadium. Idols in attendance include Super Junior, SHINee, SISTAR, miss A, Davichi, ZE:A, T-ara, MBLAQ, G.NA, INFINITE, Hwanhee, and more, making up a total of a 140-150 member cast. 2AM's Jo Kwon, whose athleticism earned him the nickname 'Kkap Bolt', is unfortunately unable to attend due to an overseas schedule. Boom, who recently was discharged from the army, will be joining the show as an MC alongside other MBC anchormen and track & field MCs. Competitions include the 50m race, co-ed high jump, co-ed 50m hurdle, co-ed 400m relay, and others.  The special will air on September 13th, one day after the Chuseok holiday. Source + Photos; Newsen via Nate