1) Make the top hole bigger, so your head fits in it, but don’t cut near the metalic ‘loopies’; you still need them to keep the metal structure in place and stretch the lamp open.
2) Reinforce with some tape.
3) Cut a little spyhole.
4) Paint a pupil & iris around it.
5) Put the sphere on your head, then stretch it open by introducing the metal structure.
6) And remember to bring a straw if you want to drink at the party!