Just got tickets to a Ke$ha concert!HELP!?

I just got tickets for my friend and me to go to a Ke$ha concert (who I cannot stand but she loves her!) I am 15 and she is 16, already got the tickets but just looked and it said tat its a 14+ event and Under 16s must be accumpanied by an adult. Do they take it seriously? Will I get in?? Its the HMV Hammersmith Apollo if this helps...