Complex sentence: Mononc' Serge (real name Serge Robert) is a "Quebecer" musician who sings in French and is best known for his extremely (often exaggeratedly) vulgar lyrics and his irreverent songs making fun of local celebrities and politicians.
Split into simpler sentences: Mononc' Serge (real name Serge Robert) is a Quebec musician who sings in French. He is best known for his exceedingly vulgar lyrics and his irreverent songs making fun of local celebrities and politicians.