haha they are actually singing about a singing lesson and yes the refrain is all about the notes do fa fa fa do fa sol fa si do mi mi mi mi do si do si sol si do. ..haha!
about remebering a solfege lesson when they where kids, learning the do-re-mi notes hence the chorus (Do-fa-fa-fa-sol-fa-sol-fa-mi-so-si-mi-mi-mii-do-si-do-si-sol-si-do) :DD
