Who recorded the album "Rumours," which became one of the best-selling albums of all time in 1977?

The album "Rumours" was recorded by the British-American rock band Fleetwood Mac. Here are the steps:

1. The question is asking about the artist or group who recorded a specific album, "Rumours," in 1977.
2. "Rumours" is a well-known album and is often associated with the band Fleetwood Mac.
3. Fleetwood Mac is a British-American rock band formed in London in 1967.
4. In 1977, Fleetwood Mac released the album "Rumours," which became one of the best-selling albums of all time.
5. Therefore, the answer to the question is Fleetwood Mac.