Karaoke Mic Bike is a mobile performance platform that brings an amplified, participatory stage to public space. Built from a cargo bike, a karaoke setup, and an evolving set of props and multilingual songs, the project invites passersby into spontaneous singing performances. Through repeated runs and incremental refinements, the bike transforms awkwardness into connection, generating video documentation, small-scale financial support, and a playful infrastructure for ongoing public experiments.