Definitely no to any concert at her age unless with an adult.
Always remember...modeling (psychological term - learning from observation to be like...said not to insult...but to clarify) is a valid, and often used, method of learning.
Who someone choses to model themselves after, or allows to influence their thinking, is one of the most important decisions one will make in life...especially if they are young.
By allowing a child to see something you know to be wrong...is, in effect, saying they are ok to emulate. It is not about the music...it is about the hedonistic, counter culture morals that are constantly preached in actions as well as verbiage (there is no shock value without doing so).
I don't mean it in a religious sense either...I am not religious...however, correct morals (ones based upon deferred gratification...leading a life that gives great happiness in the long run) come from culture because they have been proven to be successful in countless numbers of lives. Great nations are built upon great morals and culture.
It is our duty as parents to lead our children on a correct path so they may live their life with passion and great happiness. The pleasure now...to hell with culture and morals groups of people have always been around. Good parenting helps children on the correct paths in life. It is not because you don't like the message Gaga sends...it is because the message Gaga sends is not one for children...any child.
Is it right to censure information to our children?
It is not only right...it is our sacred duty to do so.