I'm assuming you're referring to the song by Pat Benatar.
Why not start off with some of the lyrics? That's if you're really stuck.
Or if you're arguing against the messages of the song begin dramatically with something similar to "Do we really belong to the light, to the thunder? Are we just victims of blah blah blah. Summarised thesis statement. *Moves on to main thesis/formal greetings etc.*
I'm also having trouble giving you ideas.
Just be true and honest when writing and don't try too hard to get it spot on first time around. Start off simple and work out from there.
Best of luck. Speeches are difficult, but they are manageable, just write, write, write.