Julen: de l'èxit viral a les xarxes al seu debut amb ‘Una cançó’ – LOS40

Write a detailed and engaging article about Julen: de l’èxit viral a les xarxes al seu debut amb ‘Una cançó’  LOS40. The article should be structured with clear distinct paragraphs, each focusing on a specific aspect of the topic. Keep the tone human and conversational while ensuring the content is informative, well-organized, and easy to read. avoid adding a conclusion; focus purely on delivering structured, insightful information.