Complex sentence: The Slickers first recorded it in 1944 with Carl Grayson supplying the vocal; their biggest all-time hit, it reached number four on the charts according to Joel Whitburn.
Split into simpler sentences: The Slickers first recorded it in 1944 with Carl Grayson supplying the vocal. It was their biggest all-time hit, reaching No.4 on the charts, according to Joel Whitburn.