pester her......and pester....and pester....when i asked my mom if i could go to the philly show she said no way, due in part that i had to work the next day, i didn't have a ride for the two hour trip, i was going alone, by bus, and she just plain didn't want me to go. BUT, i worked, and pestered and called off work, and got friends to take me, and set everything up anyways, and she finally conceeded. she actually ended up paying for the ticket because i didn't have any money and she knew how important it was to me. what a babe. oh yeah, play a lot of olp music around her. we'd go to the supermarket and i'd pop in some happiness...or clumsy, and sigh every once in a while. i gave her a mini guilt trip...and i got someone else to be on my side. my dad could care less what happened, but my sister supported the idea and voiced that to my mom.
all in all here's my advice...show her you can be very responsible, suck up, A LOT, show her how important it is to her, mention you could be on the DVD, and be persistant, never lose hope. as mean as a mom can seem, deep down they've got a big heart for their kid and they normally will let you do something if they know it means a lot to ya. good luck.