Complex sentence: John J Mellencamp, also known as John Cougar Mellencamp (born October 7,1951), is an American Rock singer-songwriter, musician, painter and occasional actor known for his catchy, populist brand of heartland rock which emphasizes traditional instrumentation.
Split into simpler sentences: John J Mellencamp (born October 7,1951), also known as John Cougar Mellencamp, is an American musician, singer-songwriter, painter, and actor. He is known for his catchy, populist brand of heartland rock, which emphasizes traditional instrumentation.