Lately wrote a few posts about nursery rhymes. Hope you don’t get bored about this! :p
Most people have a 成名曲 (popular song). Ian’s song is ABC (alphabet song). I think this is the song he first mastered, and then whenever he was asked to sing a song, he would definitely sing it - EVERYTIME, without fail!
Last year during the mid autumn festival, he was asked to sing on the stage (in his school, adhoc request), he went up and sang this song as well. Now, if you ask him, what is Ian’s song? He would answer ‘ABC!’.