Imagine: a game of "Who Am I?", but... alone! Not just a game, but a unique introspection experience. The app "Heads Up!", popularized in 2013 by Ellen DeGeneres, has become a hit. What if you're your own spectator? The origins of this game lie in philosophy. In the 17th century, British thinker John Locke argued that identity is formed by consciousness and memory. These invisible "labels" define our true selves. Modern psychology confirms this. In 1978, Ellen Langer demonstrated how external labels alter people's self-perceptions. In the age of social media, we try on dozens of virtual "who am I?"s every day. Artists also explore the topic. Marina Abramović's performances often address identity through external symbols. This internal "play" can reveal up to 70% of our hidden attitudes and beliefs. We wear up to 20 social roles a day, as Erving Goffman described in his 1959 "Presentation of Self in Everyday Life." Which "label" are you wearing today?