Design a high-energy, action-packed event poster for 'Streamer Fights' in the GTA 5 FiveM universe. The poster should feature multiple streamers in dynamic poses, preparing for an intense showdown in the streets of Los Santos. Incorporate iconic GTA 5 elements like fast cars, helicopters, and neon city lights in the background. Include a bold title 'Streamer Fights' with a tagline like 'Join the battle, win the biggest prize!' The color scheme should be vibrant, with a mix of neon blues, purples, and reds to match the excitement of the event.