Tusk is Fleetwood Mac’s 12th album and is widely known for having cost over $1M to record in 1979 – the most expensive rock album made to that point. The album went on to sell a mere 4 million copies – compared to the band’s 1977 album Rumours, which sold 10 million copies.
Despite reaching #4 on the American charts and #1 in the UK and producing two top ten singles, the album was considered a commercial failure due to the relatively low sales.
In his book, My Life and Adventures in Fleetwood Mac, Mick Fleetwood blames lack of sales on the RKO radio chain. The album was played on air in its entirety prior to its release, allowing mass home recording.