surname!!!

i know many ladies who have changed their surnames after marriage...and i know some who havent..well..its their personal choice..i remember two ladies whose change of surname have made to the front page of times of india..(dont agree that those where fit to be front page news)..now aishwarya rai changed her name to aishwarya bacchan,it is only going to increase her status .that makes her a member of the first family of bollywood..wise move!!the second lady is also a member of a first family..but it is first family of indian politics..what made priyanka gandhi to change her name to priyanka vadhera...?bharathiya naari????