Darker Themed Birthday Party Ideas..?

My 13th birthday party is next year, but I'm gonna start planning now since my mom wants to throw a big party because I will officially be a teenager xD

But, anyway, I want it to be a bit "darker". If you know what I mean

Like, the cake black and grey.

I just need some decoration ideas. Like, with lace and other "gothic" items.

Also, if anybody has a nice outfit I could wear.

Maybe a fun, dark party dress?

If you have a link, it would be very appreciated if you could post the link

And any good music? I was thinking about just playing some music from my favorite bands like Evanescence or something.

But, I just want to see if any of you have anymore good ideas

Thanks :)