Classical singers in Hindi movies? - Page 6

I really dont know AD but I dont think there is a formal system to confer these titles...I think these are titles that get attached to the names of the greats as they rise in stature...I remember once Zaakir Hussain in a concert was refered to as Ustad and he I think was playing with some senior artists and he said pls dont call me Ustad...I am too small to be refered to that in front of all these greats...
Ustad and pandit are references based on religion I guess...and in females we refer to the Muslim female singers as begu out of respect I guess.. eg.Begum parveen Sultana, Begum Akhtar etc etc ...never heard titles for female musicians who are not Muslims....

Someone enlighten pls!!