There are a lot of people at fault here. The girls parents first and foremost for letting their child go to such a show. Those who were in charge of the event; why is a 15 year old even allowed in the building regarding suggestive material, situations, et cetera?. Also Akon himself, what he was doing though from what I know he's done some form of it at every concert is over-the-top schtick or not.
I also don't believe the story about her being tricked into a 'dance contest' and all hell broke loose. Seems to me after the incident went public with her being underage thats when the whole trickery story came into play.
I definitely don't condone what Akon did as I said regardless but I damn sure don't condone parents who let their kids do whatever the hell they want. The girl should have been her tail at home hitting the books as oppose to trying to shake her tail on stage during a supposed 'dance contest'.