The Principle of Moments is the second solo album by former Led Zeppelin singer Robert Plant. It was Plant's second top 10 album in the US and UK. It also gave him his first solo Top 40 hit with "Big Log". The most popular track on album-oriented rock radio in the US was "Other Arms", which reached number one on the Billboard Top Tracks chart. Genesis drummer Phil Collins played drums for six of the album's eight songs (as he did on Pictures at Eleven). On the other two tracks former Jethro Tull drummer Barriemore Barlow performed. Like Plant's first solo album, Pictures at Eleven, the songs departed from the hard rock of Led Zeppelin. Following the strength of these albums, Plant launched a successful tour in 1983. Phil Collins was the drummer for Plant's band on this tour. Collins was content to perform in the background, despite his own enormous success as a solo artist at the time. Little Feat's Richie Hayward played drums for the Australasian leg of the tour. Rhino Entertainment released a remastered edition of the album, with bonus tracks, on 3 April 2007.