My guess is that the Athletic Competition and the Family Event are related. This person posted earlier that SeungGi emceed the event, and even sang a song as the opening; she said it was like a CD playing. 😛 Teacher SunHee appeared in the ending part.
https://www.instagram.com/p/BIC8YKAhmrW/
Teacher singing: (But can someone please share SeungGi’s singing clip too?)
https://www.instagram.com/p/BIC8zwzhYvU/
credit: yeina_love
Everything Lee Seung Gi 
AWESOME!! Thanks for sharing!! Seung Gi oppa is so darn good looking!!
Tryp, could you translate what lee sunhee said in that clip? I hear in the end he said PVC lee seung gi.
Typo #she
Honestly, I can barely hear Teacher in the video. But I saw a post on Teacher’s cafe that she said she would go wherever PFC Lee Seung Gi was.
Miss him so mush . What is that make me happy is he have healthy while training his army .
This is what Teacher said. (Translated by 永愛) Being welcomed by everyone who is so energetic and talented has made all my earlier worries disappear. I am very grateful to be invited to such a wonderful stage. Especially, for me, I will go wherever PFC Lee Seung Gi is.