Update: The recording happened this afternoon and in addition to the medley, T-ARA performed 6-member Little Apple too. In the end, T-ARA got the votes (Eunjung cried) and proceeded to the next (final) stage (直通春晚) which will be held in 11-14 Jan. (I think it will be broadcast live.)
Let's wait for the actual broadcast of today's performance. T-ARA Go! Here are the photos from the recording today.