Tim Hamill and the compositions are more individual, revealing a large array of influences, going from NWOBHM, to punk, to West Coast alternative rock. To emphasize the celebrative mood, the album features many guest musicians, with members of Heaven & Hell, Twisted Sister and Motörhead supplying vocals and guitars in many tracks. Kelly Johnson's 'ghost' presence permeates the album and the song "Legend" is especially dedicated to her. The album received excellent reviews and the German label SPV/Steamhammer guaranteed the worldwide distribution. Girlschool performed a special show celebrating their 30th anniversary on 16 December at the Astoria 2 in London. Girlschool were among the many female singers performing on veteran German hard rock singer Doro Pesch’s single "Celebrate", released in 2008. Jackie Chambers and Enid Williams were also present on stage at Doro’s 25th anniversary celebration concert on 13 December 2008 in Düsseldorf. At the beginning of 2010, Girlschool contributed to the release of the cover of their single "Emergency" by Cornish youth music charity Livewire, in order to raise funds for the victims of the 2010 Haiti earthquake. The band went on tour in Europe with the Canadian metal band Anvil in 2010. The band spent time in studio re-recording their classic 1981 album Hit and Run, during 2011. The new version of the LP, titled Hit and Run – Revisited, was released on 26 September 2011 to celebrate the original album's 30th anniversary. Girlschool continued to tour Europe and South America in 2011-12 and returned in Japan in 2013. In early 2015, they recorded a new album titled Guilty as Sin with producer Chris Tsangarides, which was released on 13 November 2015. On 30 January 2019, it was announced on the band's website that "Girlschool have parted ways once again with bassist Enid Williams" and that Tracey Lamb would return to replace her. Music and style Revolver magazine editor Christopher Scapelliti aptly described Girlschool's music as a "punk-metal mix tough, but poppy enough for radio". The influences of classic hard rock and heavy metal are present in the musical background of all the original band members and they are particularly evident in the clean and sometimes bluesy solo guitar work of Kelly Johnson. Artists like Led Zeppelin, Black Sabbath, David Bowie, T. Rex, Suzi Quatro have been influential on the Girlschool members. Punk rock had a direct influence in the birth of new wave and new wave of