Tusk is the twelfth album by the British/American rock band Fleetwood Mac. Released in 1979, it is considered experimental, primarily due to Lindsey Buckingham's sparser songwriting arrangements and the influence of punk rock and new wave on his production techniques. Costing over $1 million to record (a fact widely noted in the 1979 press), it was the most expensive rock album made up to that point. Compared to 1977's Rumours which sold 10 million copies by March 1978, Tusk sold four million copies. Because of this, the album was regarded as a commercial failure by the label and it holds the record for a major-label band having the biggest drop in sales from one album to the next.