Answer:
When I live I cry if you don't kill me I'll die.
Light me up in backyard gatherings
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
The most famous dinner
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.