Mick Fleetwood was scouting studios in Los Angeles, he heard the American folk-rock duo Buckingham Nicks, consisting of guitarist and singer Lindsey Buckingham and singer Stevie Nicks. In December 1974, he asked Buckingham to join Fleetwood Mac. Buckingham agreed on the condition that Nicks could also join. The addition of Buckingham and Nicks gave the band a more pop rock sound and their 1975 album Fleetwood Mac topped the Billboard 200 chart in the United States. Their next album, Rumours (1977), produced four U.S. Top 10 singles and remained at number one on the Billboard 200 for 31 weeks. It also reached the top spot in countries around the world and won the Grammy Award for Album of the Year in 1978. Rumours has sold more than 40 million copies worldwide, making it one of the best-selling albums in history.
