I have a big problem. Some one plz help!?

Okay i was going to bring my friend to a concert. It turns out that my parents don't want to drive her up to the concert because it's a 4 hour drive. So the thing is it's 6 days til the concert and she still thinks she's going. I don't know how to tell her she can't go. Also my other friends tori and stevie are not helping. They are texting her saying i wish i could go to that concert and soo on trying to give her a hint. What should i do!