HELP!!

I met a girl at a concert a few weeks ago. Today she's slid in my dms asking if I could go to a Detroit show with her. I live 12 hours away from Detroit. She already bought the ticket and got a hotel. My mom said she doesn't want me to go because I and the girl don't know each other well. She also doesn't want to drive 12 hours. I keep trying to convince her because I really want to see the people performing I love them no joke. Soo I came here for advice or an elaborate plan to get to Detroit on Sunday and try to convince my mom.