Over acting.
Scream so loud when she sees her idol.
Such a great stalker.
Defender of her idol.
Basher of idol's hater.
Memorizing every info of her idol.
Puts a lot of posters in his/her room.
Saves a lot of pictures in his/herer phone.
Downloads all videos that features his/her idol.
Cries when the idol is crying.
Feels happy when the idol is happy.
To make it shorter, a fan is the one who is attached too much to his/her idol. The one who is firstly affected when something happens to her idol. But for me, the best definition of a fan, a true fan is that, whatever happens to his/her idol, postive or negative, he'she will stay and be still a fan.
A real fan doesn't know how to leave his/her idol. He/she will stay forever. And ever.
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LOL. HAHA feel ko magenglish kahit mali mali. Kkaepsong! XD