Complex sentence: His debut album "Shaun Cassidy" was initially released in Europe and Australia in 1976, and he scored a couple of hit singles in several countries, leading to an American release of that album in 1977.
Split into simpler sentences: His debut album "Shaun Cassidy" was initially released in Europe and Australia in 1976, and he scored a couple of hit singles in several countries. That led to an American release of that album in 1977.