For that year , Billboard magazine also ranked Dr. Dre as the eighth best-selling musical artist , The Chronic as the sixth best-selling album , and `` Nuthin ' but a ` G ' Thang '' as the 11th best-selling single .
That year , Billboard magazine Dr. Dre was the eighth best-selling musical artist , The Chronic was the sixth best-selling album , and Nuthin ' but a ` G ' Thang ( the first single from the album ) as the 11th best-selling single .