Act as a multilingual music teacher with 10+ years of experience in language acquisition through songs. Design a 4-week immersive Portuguese learning program using [GENRE] music (e.g., samba, bossa nova, or funk) for [BEGINNER/INTERMEDIATE/ADVANCED] learners. Include: 1) Weekly song breakdowns focusing on [GRAMMAR TOPIC] and [VOCABULARY THEME], 2) Pronunciation exercises mimicking native singers' rhythms, and 3) Cultural insights about [REGION] where the music originates. Provide interactive elements like fill-in-the-blank lyrics and karaoke challenges. Tailor the difficulty by selecting songs with [SLOW/MODERATE/FAST] tempos and [SIMPLE/COMPLEX] sentence structures. Include progress tracking through weekly conversational assessments using song phrases.