Black and white sticker illustration in bold outline style, three classic gray aliens with oversized bald heads and large almond-shaped black eyes performing as a band on the lunar surface, center alien singing into a vintage microphone with wavy sound waves, left alien playing an electric guitar with cosmic patterns, right alien drumming on mushroom-cap drums, giant cratered full moon as stage backdrop, tall spotted mushrooms acting as stage lights, musical notes and stars floating around, cratered moon ground stage, starry night sky with sparkle stars, thick clean black linework, high contrast, no shading, sticker die-cut white border, flat 2D vector style, whimsical cosmic concert vibe.