"Rumours" was an instant commercial success, selling over 10 million copies worldwide within just a month of its release. It garnered widespread acclaim from critics, with praise centred on its production quality and harmonies, which frequently relied on the interplay among three vocalists and has inspired the work of musical acts in different genres. It won Album of the Year at the 1977 Grammy Awards. It has sold over 40 million copies worldwide, making it one of the best-selling albums of all time. Domestically, it has received Diamond certifications in several countries, including the UK, Canada, and Australia, and has been certified 20× platinum in the US.