How singers were chosen for the songs

[S.Balaji]

Dear All,

Its a wonder .. how generally singers were chosen for a particular song.... And those songs also become fabulous hits / smashing hits....
There might be lengthy discussions between Director and the Music director and also the producer .. as to who can sing this song..
There could also be like... pre-set combination like...
For Shivaji / MGR / Jayashankar / Ravi Chandran / AVM Rajan - TMS TMS only
For Savithri / Sarojadevi / Jaya / Vani Shreee etc etc... Mostly PS only...

but I wonder how they finalise the singer.

There could be numerous exchange of thoughts before a singer is finalised.

CAN WE EXPECT FROM SENIOR HUBBERS AS TO HOW SINGERS WERE CHOSEN AND HOW SUCH SONGS BECAME GLORIOUS HITS AND TIME IMMEMORIAL ONES.

Looking forward