second Wolfmother album in Los Angeles, initially working briefly with The Raconteurs drummer Patrick Keeler. After returning to Australia, he enlisted new members Ian Peres (bass, keyboards), Aidan Nemeth (rhythm guitar) and Dave Atkins (drums) for "Wolfmother Phase II". The new members officially joined on 5 January 2009, before performing their first live shows under the alias "White Feather" in February. Recording for a new album commenced in March with producer Alan Moulder, with Stockdale describing the material as "a little bit heavier". The first song released by the second line-up of Wolfmother was "Back Round", which was made available as a free digital download on the band's official website on 30 March 2009, after its debut live performance the previous week at the MTV Australia Awards 2009. After the rest of the album was recorded, "New Moon Rising" debuted on Triple J in August and was later released as the album's lead single. The album, Cosmic Egg, was released internationally by Modular in October. It was another commercial success, reaching number 3 in Australia, number 16 in the US, and number 35 in the UK. Cosmic Egg was supported on the New Moon Rising World Tour, which started in Australia and later visited North America and Europe. The group also supported AC/DC on the Black Ice World Tour in Australia. The following year, the album was nominated in the Classic Rock Roll of Honour Awards for Album of the Year, although it lost out to guitarist Slash's self-titled debut solo album (on which Stockdale is featured on the song "By the Sword"). In March 2010, Wolfmother contributed the song "Fell Down a Hole" to the Almost Alice soundtrack. At the end of the month, it was announced that drummer Dave Atkins had left the band. A press release was later issued explaining that the drummer had "decided to leave the band to spend much-needed time at home with his family". It was announced at the same time that Atkins' replacement would be Will Rockwell-Scott, known for his work with Har Mar Superstar and The Mooney Suzuki. The group continued to tour with Rockwell-Scott, although they had to cancel a string of European dates, including a number of festival appearances, in June and July due to an unspecified illness suffered by Stockdale. The following January and February, the band performed at Big Day Out in Australia and New Zealand. 2011–13: