In late 1974, while Fleetwood was scouting studios in Los Angeles, he was introduced to folk-rock duo Lindsey Buckingham and Stevie Nicks. Fleetwood Mac soon asked Buckingham to be their new lead guitarist, and Buckingham agreed on condition that Nicks would also join the band. The addition of Buckingham and Nicks gave the band a more pop rock sound, and their 1975 self-titled album, Fleetwood Mac, reached No. 1 in the United States. Rumours (1977), Fleetwood Mac's second album after the arrival of Buckingham and Nicks, produced four U. S. Top 10 singles and remained at number one on the American albums chart for 31 weeks. It also reached the top spot in various countries around the world and won a Grammy Award for Album of the Year in 1978. Rumours has sold over 40 million copies worldwide, making it the eighth-highest-selling album in history. The band went through personal turmoil while recording the album, as both the romantic partnerships in the band (one being John and Christine McVie, and the other being Buckingham and Nicks) separated while continuing to make music together.